'67 GTO LS3 Swap
#23
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CFster,
Have you figured out a plan for your gas pedal yet? I've done some research, and haven't found anything that discusses what DBW pedal assembly fits into '64-'67 A-bodies.
Thanks,
Jeff
Have you figured out a plan for your gas pedal yet? I've done some research, and haven't found anything that discusses what DBW pedal assembly fits into '64-'67 A-bodies.
Thanks,
Jeff
#24
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I'm going to use the pedal that came with my SpearTech kit, which is the same one that comes in the GMPP harness kit. I haven't even looked under the dash yet to be honest - I expect I'll have to fabricate some kind of bracket I'm sure...
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Here is a vid of the engine running, just to get a baseline. I'll take the same vid afterwards so we can hear the difference in sound. We'll be using the same exhaust.
http://www.youtube.com/watch?v=3wbuhox0JU8&hd=1
Also, we weighed the car today:
LF - 1081 lbs, RF - 1063lbs, Front axle - 2144lbs
LR - 813lbs, RR - 807lbs, Rear axle - 1620lbs
Total - 3764
Should be interesting to see what the difference is.
http://www.youtube.com/watch?v=3wbuhox0JU8&hd=1
Also, we weighed the car today:
LF - 1081 lbs, RF - 1063lbs, Front axle - 2144lbs
LR - 813lbs, RR - 807lbs, Rear axle - 1620lbs
Total - 3764
Should be interesting to see what the difference is.
#29
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Funny you should ask! We stabbed it in this morning. I can't believe how easily it went in. Transmission had to come forward about 3/4" (the holes in the trans mount are slotted so that was easy). Only problems were the trans cooler lines have to be rerouted, and the header hits the brake junction block on the left side - no big deal.
Old motor out -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9925/1122455357_hpduB-XL.jpg)
Chevelle small block frame mounts in -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9927/1122455368_m5mSx-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9930/1122455496_V2f8F-XL.jpg)
Going in -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9931/1122455495_45KYD-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9932/1122455580_Yxntc-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9934/1122455640_ce84J-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9933/1122455662_XEZBM-XL.jpg)
Holy crap did the front come up! Going to have to change springs.
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9937/1122455743_mw3dj-XL.jpg)
The tie-rods come within about 1/16" of the oil pan, so that should be ok.
I have to move the washer jug. That's the extent of my clearance issues.
Now the real work begins - plumbing, wiring etc!
Old motor out -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9925/1122455357_hpduB-XL.jpg)
Chevelle small block frame mounts in -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9927/1122455368_m5mSx-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9930/1122455496_V2f8F-XL.jpg)
Going in -
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9931/1122455495_45KYD-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9932/1122455580_Yxntc-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9934/1122455640_ce84J-XL.jpg)
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9933/1122455662_XEZBM-XL.jpg)
Holy crap did the front come up! Going to have to change springs.
![](http://cfster.smugmug.com/Cars/Restorations/GTO/DSC9937/1122455743_mw3dj-XL.jpg)
The tie-rods come within about 1/16" of the oil pan, so that should be ok.
I have to move the washer jug. That's the extent of my clearance issues.
Now the real work begins - plumbing, wiring etc!
#30
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looks great , Where do you plan on mounting the ecm? I mounted mine on a fabbed up plate in the interior over the trans hump against the firewall, if I had to do it again I would have mounted it in the glovebox area so the fuse panel and ecm .is easily accessable . where it is now it got real crowded and now is hard to get to . JOHN
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Thanks, John!
I have no idea where I'm putting the ECM at this point. I have a Vintage Air system too, so there isn't a lot of room under the dash.
Right now I'm focusing on the fuel system. I just ordered a bunch of fittings from Summit. I literally had to draw a diagram so I could get it all straight.
We have a flare tool that will make GM style quick disconnect fittings so I'll be using those on the hard line and Russell adapters, AN fittings and some hose.
I've also been communicating with Ron Davis radiators about a custom radiator with a steam line fitting. Not cheap!
What did you do for a P/S pressure line?
I have no idea where I'm putting the ECM at this point. I have a Vintage Air system too, so there isn't a lot of room under the dash.
Right now I'm focusing on the fuel system. I just ordered a bunch of fittings from Summit. I literally had to draw a diagram so I could get it all straight.
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
I've also been communicating with Ron Davis radiators about a custom radiator with a steam line fitting. Not cheap!
What did you do for a P/S pressure line?
#32
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For p/s I went to the junk yard and got a few different lines off p/s pumps , most of them were cut being that they were takeouts, needing the pump side from them only( metric ). on the box side I used an original style end ( I had a few different hoses )and used the one with the shortest 90 on it. I brought them both to my local hose guy and he mated them with the proper length and orientation.on the steam I used a fitting from jags that run,being that I did not consider this when ordering the rad. they also have any reducers for the rad. lines you might need .I would plan your air intake system while planning your rad.being that you are getting a custom rad you can get the inlets/outlets so they dont interfere with the air plumbing and elec. fans.try afco for a rad .they make a rad for this install with the inlet and outlet on the same side,dont know if it will work for your app.JOHN
#33
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by looking at your setup I would leave your existing rad .the upper hose looks to be an easy setup being that the ls3 waterpump outlet is closer to the drivers side and install the steam fitting in the upper hose somewhere. JOHN
#34
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I've always been fond of those cars. Granted, you got the wrong year.
What year are those mounts from? I think I have the 68-72 mounts for my LSx swap, because mine look totally different (yet they're SB mounts). I'm not sure it matters, since I plan to drill out the frame on my '66 after getting the engine where I like it anyway...
I agree with john on the radiator, btw. Also, my '66 non-AC with 15" tall core fits a Ford Contour dual fan setup perfectly. Worth looking into if your radiator is the same. I've got an aluminium Mark 7 in mine ($pendy!).
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
I agree with john on the radiator, btw. Also, my '66 non-AC with 15" tall core fits a Ford Contour dual fan setup perfectly. Worth looking into if your radiator is the same. I've got an aluminium Mark 7 in mine ($pendy!).
#35
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Cfster,
Nice job with the motor install, looks like you made short work of it. Earlier in this thread you asked where to buy SBC frame mounts. Where did you end up buying them? P/N and price? And did they bolt into existing holes, or did you have to drill new ones?
Also, I know your goal was to locate the engine in the original location for bolting the trans up.....I have the same concern since I already have a TKO-600 mated to my stock 400. Looks like moving the trans forward was easy for you with the slotted holes. Are you concerned about driveshaft length? My guess is 3/4" isn't going to be an issue. The output shaft/yoke spline should take care of that, eh?
I've got an LQ4 block that I'm building now with L92 heads, LS3 intake, etc. I'm still undecided about exhaust. I can't decide between trying to run stock camaro manifolds, shorty headers or long tubes. I really want to make stock LS3 manifolds work. I know you made the assumption early on that there's no way to make them work. Did you ever confirm that?
One more thing. I've heard concerns about the exterior walbro pump "running dry" with lower fuel levels, like 1/2 tank or less, especially when driving hard. Some feel a sumped tank and internal pump is the only way to go. Did you discover anything about this in your research? I'm on the fence about which route to take. The external pump and filter/regulator is certainly the easier, less expensive option.
Sorry for the long post, and thanks in advance for any advice!
-Jeff
Nice job with the motor install, looks like you made short work of it. Earlier in this thread you asked where to buy SBC frame mounts. Where did you end up buying them? P/N and price? And did they bolt into existing holes, or did you have to drill new ones?
Also, I know your goal was to locate the engine in the original location for bolting the trans up.....I have the same concern since I already have a TKO-600 mated to my stock 400. Looks like moving the trans forward was easy for you with the slotted holes. Are you concerned about driveshaft length? My guess is 3/4" isn't going to be an issue. The output shaft/yoke spline should take care of that, eh?
I've got an LQ4 block that I'm building now with L92 heads, LS3 intake, etc. I'm still undecided about exhaust. I can't decide between trying to run stock camaro manifolds, shorty headers or long tubes. I really want to make stock LS3 manifolds work. I know you made the assumption early on that there's no way to make them work. Did you ever confirm that?
One more thing. I've heard concerns about the exterior walbro pump "running dry" with lower fuel levels, like 1/2 tank or less, especially when driving hard. Some feel a sumped tank and internal pump is the only way to go. Did you discover anything about this in your research? I'm on the fence about which route to take. The external pump and filter/regulator is certainly the easier, less expensive option.
Sorry for the long post, and thanks in advance for any advice!
-Jeff
#36
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Also, I know your goal was to locate the engine in the original location for bolting the trans up.....I have the same concern since I already have a TKO-600 mated to my stock 400. Looks like moving the trans forward was easy for you with the slotted holes. Are you concerned about driveshaft length? My guess is 3/4" isn't going to be an issue. The output shaft/yoke spline should take care of that, eh?
I've got an LQ4 block that I'm building now with L92 heads, LS3 intake, etc. I'm still undecided about exhaust. I can't decide between trying to run stock camaro manifolds, shorty headers or long tubes. I really want to make stock LS3 manifolds work. I know you made the assumption early on that there's no way to make them work. Did you ever confirm that?
One more thing. I've heard concerns about the exterior walbro pump "running dry" with lower fuel levels, like 1/2 tank or less, especially when driving hard. Some feel a sumped tank and internal pump is the only way to go. Did you discover anything about this in your research? I'm on the fence about which route to take. The external pump and filter/regulator is certainly the easier, less expensive option.
If you need any help with adapter #s and whatnot for your lines let me know. I just got a whole mess of fittings for the fuel, trans cooler and power steering lines. What a pain in the ***.
#37
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Awesome. Thanks again.
On the headers, are they 1 7/8" primaries? I couldn't find that on S&P's website and sounds like the LS3/L92 heads might need that as opposed to 1 3/4? I haven't received my heads yet to measure/confirm (they are on order).
It's very convenient you're doing this install just a few months before me. Thanks for being the guinea pig!
Keep up the good work.
-Jeff
On the headers, are they 1 7/8" primaries? I couldn't find that on S&P's website and sounds like the LS3/L92 heads might need that as opposed to 1 3/4? I haven't received my heads yet to measure/confirm (they are on order).
It's very convenient you're doing this install just a few months before me. Thanks for being the guinea pig!
Keep up the good work.
-Jeff
#38
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A quick update. Ordered some suspension and brake pieces.
From SC&C (thanks to Marcus for being so helpful)
-Stage 2 AFX front end kit
-SPC lower control arms
-Currectrac rear upper and lower arms
-4 SPC springs
-4 double adjustable VariShocks
-Rear Spohn Pro-Touring sway bar
From Kore3 (Tobin was very helpful as well!)
-4 way C6 Z06 brakes with silver calipers (no Corvette logo)
I know what wheels I want:
![](http://www.newgenwheels.com/Images/Wheels/5001.jpg)
But I'm just trying to work myself up to swallowing the cost. Somebody talk me into it.
Waiting for a weekend when it doesn't snow up here in New England to get started with the fuel system and plumbing, then we'll tackle wiring.
From SC&C (thanks to Marcus for being so helpful)
-Stage 2 AFX front end kit
-SPC lower control arms
-Currectrac rear upper and lower arms
-4 SPC springs
-4 double adjustable VariShocks
-Rear Spohn Pro-Touring sway bar
From Kore3 (Tobin was very helpful as well!)
-4 way C6 Z06 brakes with silver calipers (no Corvette logo)
I know what wheels I want:
![](http://www.newgenwheels.com/Images/Wheels/5001.jpg)
But I'm just trying to work myself up to swallowing the cost. Somebody talk me into it.
Waiting for a weekend when it doesn't snow up here in New England to get started with the fuel system and plumbing, then we'll tackle wiring.
#39
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
A quick update. Ordered some suspension and brake pieces.
From SC&C (thanks to Marcus for being so helpful)
-Stage 2 AFX front end kit
-SPC lower control arms
-Currectrac rear upper and lower arms
-4 SPC springs
-4 double adjustable VariShocks
-Rear Spohn Pro-Touring sway bar
From Kore3 (Tobin was very helpful as well!)
-4 way C6 Z06 brakes with silver calipers (no Corvette logo)
I know what wheels I want:
![](http://www.newgenwheels.com/Images/Wheels/5001.jpg)
But I'm just trying to work myself up to swallowing the cost. Somebody talk me into it.
Waiting for a weekend when it doesn't snow up here in New England to get started with the fuel system and plumbing, then we'll tackle wiring.
From SC&C (thanks to Marcus for being so helpful)
-Stage 2 AFX front end kit
-SPC lower control arms
-Currectrac rear upper and lower arms
-4 SPC springs
-4 double adjustable VariShocks
-Rear Spohn Pro-Touring sway bar
From Kore3 (Tobin was very helpful as well!)
-4 way C6 Z06 brakes with silver calipers (no Corvette logo)
I know what wheels I want:
![](http://www.newgenwheels.com/Images/Wheels/5001.jpg)
But I'm just trying to work myself up to swallowing the cost. Somebody talk me into it.
Waiting for a weekend when it doesn't snow up here in New England to get started with the fuel system and plumbing, then we'll tackle wiring.
DO IT ! what feels better than a new set of rims and tires ?