Which is the Best LSx Eng for me?
This decision is harder than buying the car.
BTW, I want to put a T56 behind it and go from a column shift 3 speed auto to manual.
I am not in a huge hurry to complete the car, I just want to find a motor to start it.
Thanks for any opinions suggestions or recommendations.
With a LS1 (or any of the LSx car engine) you will get the Car intake which does look better and are easier t work with. But the Truck intakes do make very good torque which will work out much better for a DD.
How about considering your Budget and skill level ?.. that might help direct you which way you go. Are you going to have to out source the work or will you DIY ?
You can view many of the A-body swap builds in the FAQ / Sticky... my build link is in my sig.
Bottom line.. you can't go wrong with anything as all will give you a vast improvement in both power and MPG. But try and get a complete bundle (Front end Accessories, intake, etc).
BC
With a LS1 (or any of the LSx car engine) you will get the Car intake which does look better and are easier t work with. But the Truck intakes do make very good torque which will work out much better for a DD.
How about considering your Budget and skill level ?.. that might help direct you which way you go. Are you going to have to out source the work or will you DIY ?
You can view many of the A-body swap builds in the FAQ / Sticky... my build link is in my sig.
Bottom line.. you can't go wrong with anything as all will give you a vast improvement in both power and MPG. But try and get a complete bundle (Front end Accessories, intake, etc).
BC
I am looking at a 2002 LS1 out of a Firebird with 90K miles and the guy is asking about $2000 and that covers everything except the tranny. So from what I have seen that is not a bad deal.
I have read through your build a couple times BTW. It was one of the better ones out there.
A simple Cam update and you are in for endless miles of fun.. find a used LS6/Z06 cam $100-150, purchaces some LS6 springs (yellow or blue) $54 from SDPC.. and you'll be good.
But even if the LS1 doesn't work out. a good 5.3L will give you a good 300- 350 HP, the sam LS6 cam will also work on the cheap.
Thanks for the words.. The people on this forum are hear to help.. just ask...
Something to consider with the T56, you'll need to cut your tunnel, and need a 3.72 or higher with a 0.5 OD.
Considering LS1s have not been made in 10 years, and I've seen a lot of "low mileage" shot ones. An iron 6.0 has same hp with a lot more potential at half the cost and lower miles.
My build:
https://ls1tech.com/forums/conversio...442-build.html
A simple Cam update and you are in for endless miles of fun.. find a used LS6/Z06 cam $100-150, purchaces some LS6 springs (yellow or blue) $54 from SDPC.. and you'll be good.
But even if the LS1 doesn't work out. a good 5.3L will give you a good 300- 350 HP, the sam LS6 cam will also work on the cheap.
Thanks for the words.. The people on this forum are hear to help.. just ask...

I know if I go to a T-56 I have to cut the tunnel which I am willing to do.
bczee- What did you pay for your Viper trans? And how hard was the conversion to run with an LS1. One thing I think I discovered today is that a Corvette T56 wont work on an LS1. Always thought they looked wrong.
garys68 - Read your build thread, very nice and gave me a lot to think about.
One thing that is still leading me to the LS1 is that since it came out of a Firebird or F-body, I should be able to use the stock pan that came with the motor correct? Or will I still be looking at notching? I plan on using the Dirty Dingo mounts since they are local and using the Kwik or Dirty Dingo A/C relocation brackets to move the AC to the passenger side top of the motor. May relocate the Alt as well.
I know that a lot of people have said you can get a 5.3 with accessories and computer for around $500-$700 but they all have well over 100K miles then add the pan, LS1 or 6 intake, fuel rails ect and you are around $1500.
I have a 6.0 in my suburban and it has a ton of power but get like 10mpg and I know the Chevelle will be about 3000lbs less, but I cans see that getting me 20+ mpg.
Thanks for the help and I hope others will jump in.
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Yes, the vette version is of a different configuration. Cost to much to convert.
I paid $2400 if I recall. It was converted to a f-body input shaft. I had to fab/convert a clutch throw out bearing to work. Else, everything pretty much swapped in like a f-body T56.
You can use the f-body pan, but it is a very, very tight fit.. With the engine going in and out. Trans has to be installed after the engine is in, it can be done at the same time, but is way to much work and you have almost drop the engine/trans vertical before you will get the pan to clear the ccross member.
BC
The Best V8 Stories One Small Block at Time
Shop around. I lowballed offers on ebay auctions that expired on both the 6.0 and 5.3. Got them both for a lot less than the "buy it now" price. Same thing on parts. I found LS1 intakes locally (craigslist) for under $40, bolts and rails included. Pans for around $100.
And the 6.0 LQ9 in my 68 corvette gets well over 20mpg. Actually got a best of 26mpg hiway with OD trans. The 5.3 in the Olds with 4 speed, 2.73 rear gets about 22mpg combined, with a light foot.
I did a quick search this morning on LKQ and Car Part this morning and nothing local on a 6.0 or 5.3 Under $1000 that didnt have 120K plus miles on it. I know prices have gone up but they are getting harder to come by.
So the search continues. If I can pick up that viper T56 for under $2500 shipped it might not be a bad deal.
You can see the shifter does clear the Bench seat.

With a F-body T56 trans in place.. (no seat). The F-Body shifter is right at the end of the output shaft housing as compared to the Viper one (above).

Here is the front of the Viper trans. you can see the TB bolt holes are clocked differently.

You can see that the shifter location is closer to the mid inspection plate.

BC
Of course you can always do a 5.3 on the low buck, get the thing LS platform ready and running and then swap to a bigger mill down the road. Lots of options but as always, get the $ plan figure out first or this can get overwhelmingly pricey and/or underachieving on performance.
Shipping via truck freight to a local shipping terminal should be under $100.
Either way I am now leaning to the LQ route as yes it will be cheaper and since I have the cowled hood on my chevelle the truck intake should fit.
Check with ebay sellers. I've bought 2 engines from salvage companies, both shipped for under $100 on pallets.
SDparts shipped a 120lb trans to me for less than that.






