jay7199

iTrader: (9)

How much work is it getting a T56 into a older C4 corvette? The bellhousing bolt pattern has me worried, the upper bolts seem like they would be impossible to get too compared to the bolt pattern of a ZF6.

95Z28sixspeed

I thought the reason they went with the ZF on the C4 was because the T56 wouldn't fit because the bellhousing was too big?

jay7199

iTrader: (9)

not sure but I have see multiple people swap the T-56 in but they don't really give specifics or touch bases on my concerns.

cuisinartvette

Only the top centerbolt isnt used I believe rest bolt right up

On the engine swap make life easy on yourself and get a converted LT1 intake call it a day

kc9406

iTrader: (1)

My friend swapped an LT1/ T56 setup into his 84'. I'll ask him to post here when he gets a chance. I don't remember it being too bad of a deal tho.

v8vette84

I am that friend! haha I have an 84' Vette that I swapped an LT1/T-56 into. The swap was a lot easier than I figured it would be. I used a bracket that bolted to the tail of the T-56 so that the T-56 could bolt up to the "C beam" and it worked very well! (Bought online but I don't remember where, it was like $150-$170 I think) I also just recently decided to truly fix the offset shifter problem. The ZF6 shifter is offset to the driver side by around 2" while the T-56 is right in the middle. I bought a used 4+3 shifter bezel and took the shifter I was using in the Vette and welded in 1.5" (Should have done 2") of square tubing and that offset the shifter so it would not hit the bezel anymore. ( I still had the cut the underside of the bezel a little but from above with the cup holder door closed it looks fine.) It takes a little bit of work but I could not find a cheap ZF6 so I went with the cheaper T-56. (Still plenty strong) I used a C4 master cylinder with a C4 hydraulic line with one end threaded like a brake line for the C4 master then I adapted to a T-56 slave style connection. (Weird slip fit fitting that is held in by a roll pin) I swapped a T-56 in my 3rd gen then obviously this 84' C4. I like the T-56, both have been GREAT!

jay7199

iTrader: (9)

thanks for the heads up man, what rear end are you using?

v8vette84

I am currently in the process of dropping the factory 3.07 rear and installing a 3.73 ratio Dana 36 in place of it. It's been in the air for probably a month now. haha So I hope to get it done soon. (I've been insanely busy) With the 3.07's at 1800 rpms I'm doing 90mph in 6th. I cruise in 5th at 60 otherwise if I'm in 6th I feel like I'm lugging the engine down.

v8vette84

Hey i just saw your signature! I'm also a Z51 C4! Sweet! haha

jay7199

iTrader: (9)

yeah i love the car, but the 4+3 just died and the old small block isnt anything impressive. So im thinking about putting my built LT1 drive train in it, Do you have any mods? Im worried about the Dana 36 dying to my Heads/Cam 355 LT1.

v8vette84

The whole Dana 36 is weak is the same thing as the F-body world saying the 10 bolt is weak. Many have lasted a long long time to abuse and some haven't. I think the 36 is underrated personally like the 10 bolt. As long as your not using slicks you will be ok. I have LE1.5 heads, custom cam, and all the accompanying mods. Here is my video of me running a 12.4 @113.5mph. (I also have an issue with valve float as the cam is designed to run to at least 6500rpms and power is dropping off at just under 6k.) I also got 28mpg on the highway with her!


You can hear my bogging launch, haha.

jay7199

iTrader: (9)

nice run man, awesome advice. Man I tell you, the corvette forums are not very insightful. im gona have to agree with you on the 10 bolt thing, My old camaro's 10bolt lasted for ever making 440 at the tires.

After hearing all this, im going to press on and do the swap, and probably upgrade to 3.73 gears in my 36.

I would be happy trapping 115-120 area, my setup is very similar with a LE cam, Trickflow 21* heads, lightly ported intake and a electric water pump.

Are you still using the digital dash? I would like to keep mine, Also what headers are you running?

v8vette84

Yea I trap just under 116 when I MPH the best. I have a few slips for mid-high 12's for the high 115mpg range. I can't wait until I get the valve float fiqured out and the gears. She will be a whole new beast! O and yes the corvette forums are a bunch of *** jokeys. Cocky jerkoffs who like to put you down. I used the site "Digital Corvettes" they are much nicer!

v8vette84

O I forget, I'm running OBX stainless headers (Ebay $400 when I bought them) into a 92-96 Magnaflow cat-back. THe headers looked identical to the stainless works headers that were like $1,500. These headers were built well and aeven had all the ports cleaned out with no slag in them. I was impressed. If I run across the picture I took of the ports I'll post it. I have no idea where it is though. haha

v8vette84

These

http://www.ebay.com/itm/OBX-Exhaust-Manifold-Headers-92-96-Corvette-LT1-LT4-C4-/181494735360?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a41ede200&vxp=mtr
They went up by $100 since I bought them, still way cheaper than ANY other company. I like to buy American made any chance I get but I'm not going to pay $1500 for a set of headers. Plus the extra price for the Corvette tax.... You can buy small block long tube headers for like $150, granted the vette ones are stainless but come on....

v8vette84

This is my gauge setup. 97' F-body gauges modified to fit into an aluminum piece I created.



Screw the digi dash...

merim123

iTrader: (11)

you're the MAN on that digital dash swap, LOL best idea I've seen yet. The cbeam adapter guy hasn't been around, those brackets were about 150, not sure anyone is making them. I had these guys saved in my favorites, worth giving them a call.

http://www.tommysspeedshop.com/

merim123

iTrader: (11)

you're the MAN on that digital dash swap, LOL best idea I've seen yet. The cbeam adapter guy hasn't been around, those brackets were about 150, not sure anyone is making them. I had these guys saved in my favorites, worth giving them a call.

http://www.tommysspeedshop.com/

merim123

iTrader: (11)

you can also use any firebird 94-97 cluster or a 97 camaro cluster and i think 98 camaro as well. 99+ went to BCM so they are not compatible.