ok i know i'm probably about to get flamed here for starting this thread when there's already a lot of info on LT1 swaps that have already been posted, but i have a few questions anyway and really don't want to search hundreds of posts to find my answers. so if you're here to tell me i posted in the wrong area or that i'm posting what someone else already asked, just don't even comment because i don't want to hear it.

with that being said...

i recently bought a 1991 Camaro (V6) off of one of my friends who also is on this site (forgot his name on here but he's an active user and posted many many pictures of the car over the last few months, so you've probably seen it but like it said i don't know his username so i can't tell who it is) and basically the reason i bought the car is because the whole thing is 100% rust FREE, which, if you know anything about Chicago cars, is like finding a sapphire in a mound of dirt. so i have a clean perfect body to work with, only thing is it's a v6 manual trans car and i plan on making it a v8 obviously so i know a LOT of things need to be changed.

basically what i'm looking for is more or less a LIST of everything i'll need for the car to be running/driving properly. and by list i mean a comprehensive list with all the nitty gritty details, not just "get a motor and a stronger trans to handle it" i mean i want to know about fuel lines, if any changes need to be made to the driveshaft, etc, cuz its things like that that are gonna f*ck me up last minute just when i though i had the whole thing put together.

so you can better assess my needs, i'll say here exactly what i want (this is set in stone, i've made up my mind, so its not up for debate, just tell me how to get there)

the car when finished will have:
-LT1 motor (stock short block but with aftermarket heads and cam)
-will be carbureted not fuel injected, so no need for wiring harness or any of that garbage
-running a turbo 350 auto trans (built to handle 600hp)
-engine bay is completely cleaned out basically except for an engine (i removed a/c, power steering, and ALL unnecessary junk, so no need to address power steering lines or a/c modifications, all that stuffs gone and not coming back once LT1 sits in there)
-nitrous (100-150 shot)

Also i have a couple questions:
-does the turbo 350 mount up the same way as a 700R4 or will it require modifications? what about the tailshaft length, which one should i get, the 6", 9", or 12", and also will the stock driveshaft be a direct fit or am i going to have to get a custom one of those too? remember the car currently has a T-5 manual right now...
-how about the rear end? i know my current rear end will not stand a chance once the v8 is in there, let alone the kind of power i want to be putting out, so what's the best swap for that, a 4th gen rear? how much hp can a stock 4th gen rear end safely handle and what is the stock gear ratio?

i'm sure i have a lot more questions i'm forgetting but this is all i can think of right now. i've come to terms with the fact that this whole build is going to set me back at least 4-5 grand, but probably closer to 6 or 7 grand, or maybe even more, i dont care about that, i just really want to do everything RIGHT this time around even if it means i won't be driving the car til next summer.

sorry for the long post, any help is greatly appreciated, i pretty much know what direction i'm going but there's a LOT of stuff i still don't know about this swap. thanks in advance guys

 

Now why would you assume that???

Let me catch my breath.

Okay, now...
Fuel will be like any other EFI to carb swap. Better in-tank electric pump like a Walbro 255, and a return-style regulator like a Mallory 4309.

You will have to adapt/fabricate lines in the engine compartment for the regulator and carb. If you need a parts list for doing that, you're probably over your head with this swap.

Wiring will be dictated by whatever system you use to convert the LT1 to carb.

I'll combine these. Yes, the TH350 mounts up to the engine exactly like a TH700R-4 does. You will need a 153-tooth flexplate (with the power you're planning on, might as well be an SFI unit). You will need a swap transmission crossmember for the TH350 (doesn't matter which tailshaft length you use). A 9" tailshaft tranny can use a stock-length 3rd gen driveshaft, but again with the power you're talking about, you might as well get a stronger unit, so use whatever tailshaft length you find. More on that in response to your last question below.

You'll still need an alternator.

Noted.

A 4th gen rear is a 3rd gen rear with longer axles, some with speed sensors, and different brakes. In other words, they're a younger version of the weak 3rd gen rear.

You need an aftermarket rear. Take your pick between various offerings of 9" or 12-bolt, or now Strange offers an "S60" rear. They are all heavier than the factory 10-bolts, but all strong enough to handle the task.

Back to the driveshaft - Plan on using 1350 U-joints, which means a custom fabricated driveshaft, AFTER you get the transmission and rear mounted in the car so you can get an accurate length measurement.

Your budget will need to be more than $5k in order to do all this. Plan on around $3k for the rear end, brakes, and driveshaft alone. Also, most LT1's have a bunch of miles on them, so if you hadn't already planned on it, a lower end refresh or rebuild should be assumed. Personally, I'd go with forged pistons, ARP rod bolts, and new oil pump along with all new bearings at a minimum.

Your stock rear end will handle it IF you DON'T do the nitrous, and IF you beef it up (weld the tubes, aftermarket axles, aluminum support cover). If you are set on the nitrous, though, don't spend another dime on the 10-bolt.