LT1 Help?????

[1978steven]

I have a chance to get a 1993 LT1 with an A4 tranny complete with all accessories and computer. Before I do anything I have a few questions about this setup that I hope you all can help me with.

1. How hard would it be to get this complete setup in the '71?
2. What kind of drive train moddifications would I have to do?
3. What about the fuel system and electronics?

I have a TH400 that I was going to have built for the truck, could I just use the LT1 and back it with the TH400?

Any help with this will be greatly appreciated..

[1978steven]

anyone?

[FuelCellGuy]

The LT1 swap is fairly easy. You will need to have the factory wiring harness reworked as well as the computer. I sent mine to Fuel Injection Specialties in San Antonio. I believe it was around $800 to rework the harness AND reprogram the computer. You will also either need to notch the frame for the stock accessories or go to Corvette brackets. You will need an in-tank fuel pump as well. I've got mine mounted in my fuel cell. If you are running a 400, the speedometer shouldn't be an issue. Drop me a line if you need any other info. Later, Mark

[saxmo]

I believe that there is a carb intake available for the LT1 also. So you could do away with some of the issues.

[1978steven]

Mark, your setup looks .....

Saxmo, do you have any info on that carb intake for the LT1's?

[saxmo]

yeah, I do have info. I'll dig it out of the archives and post the link to the intake.

[saxmo]

Here's the link I told you about. Enjoy

LT1 Intake Manifold for Carb $259

[1978steven]

Cool....

Originally Posted by saxmo

Here's the link I told you about. Enjoy

LT1 Intake Manifold for Carb $259

[1978steven]

What kind of horse power could I expect to get out of this engine with the carb intake and a hot cam kit?

[saxmo]

Are you gonna run the LT4 heads?

[1978steven]

Not sure, the engine is a complete LT1 out of a 1993 F-Body, still adding things up to see what I can do. I might just rebuild my 350 and throw on some Vortec heads and a nice intake and cam. I really want the LT1 so I can be fuel injected, but I looks like there are going to be a few hidden costs. I could just get it and do the carb intake thing for now and, then later rebuild it and use the fuel injection.

The engine is complete with all acc.,harness, and cpu. The guy even has the trans for it.

Originally Posted by saxmo

Are you gonna run the LT4 heads?

[FirstGen]

go with an LS1, more power, more effecient, and more expensive haha...

[saxmo]

Yep, the LT1 has quite a few costs. The 93 model has the older optispark system, none of which were that great. Is the 93 a runner?

[1978steven]

Originally Posted by saxmo

Yep, the LT1 has quite a few costs. The 93 model has the older optispark system, none of which were that great. Is the 93 a runner?

The setup has 109,XXX miles on it, but something is up with the opti spark setup. The guy is asking $500 for the engine complete, and $300 for the tranny all obo. He says the opti spark needs some parts and it will run. From what I have seen and heard this is not too bad of a price for the whole setup, and of course alot cheaper than the LS1 I would rather have. I have seen a coil pack conversion for the opti spark system if that is a major problem. I believe it was all removed and replaced with an LS1. I haven't gone and taken a look at it all yet.

[neonlarry]

The coil pac conversion is nice but it will cost more than the engine.

[FuelCellGuy]

OPTISPARK=OPTICRAP!

All the optispark setup from 95 up work great. They are hooked up to the engine's vacuum to keep moisture out of the distributor. 94 and down just has three drain holes that do nothing but suck up water. NOTE: the 95-up Optisparks cost around $299 from the dealer. I was told my engine was a 95. The Optispark went out, I ordered a 95 unit, I got it and it wouldn't fit. They have a different keyway drive than 94 down. Anyway, I sent the $299 95 Optispark back and ordered the 94 model-----> $500!! My only complaint about the LT1. Good strong engine. I have a 4L60E tranny behind it with 3:73 gears and 28" od tires which leads to about 22 MPG. I was surprised. Later, Mark

[1978steven]

Thanks for all the info guys, I think I'm leaning more towards just rebuilding mine and putting the TH400 behind it. For cost reasons it will be more beneficial right now. I'll have to hold out for an LS1 setup later down the road.