I know that the stock motor mounts can be used when dropping an LT1 into a late 70's Camaro, but will the tranny mounts work and will the driveshaft need to be cut down? Also, is the wiring something that could be done by me or would I be better off having a shop or someone else make a custom harness and wire it for me? I'm pretty good at working on cars but wiring is definitely my weakest area.

 

Depends on what trans you use. If you use the stock trans (I'm assuming the TH350 or TH400) everything should line up fine.

For the wiring, are you dead set on keeping it stock EFI? I would almost buy one of the new self learning EFI systems and bolt that up. You would need a new intake however. Either way, if wiring it isn't something you feel comfortable with, I'd pay someone else to do it.

Edit: I just noticed you posted your were putting a A4 in as well. 700R4 or 200-4R? I'm gonna think it's the 700R4 and with that you'll need to shorten the drive shaft and I do believe a different cross member, but I'm not 100 percent sure on that.

 

The crossmember will work with either 700r or 200r, but will need to just get relocated and new mounting holes drilled at the subframe, and the trans mount plate. As for the wiring; I'd get the stock harness and computer with the engine and install it as a unit. It's the cheapest way to go, and there is lots of info on the internet to assist in telling you what you can keep, and what goes away.
The aftermarket EFI Craby mentioned is probably easiest, but it's also not cheap. The cheapest is to get a carbed engine as a donor, and just bolt it in and go.
One thing to remember about using any EFI (stock or aftermarket) is you'll need to drop the tank and have it modified to accept an electric fuel pump and return line. The simplest route would be to use the LT1 and convert it to carburetor, and distributor, but that also requires a new cam and an externally mounted electric fuel pump, as they don't have mounting for a mechanical pump.

 

There's no need to change the cam. If you want to go stand alone with the LT1, Chevrolet Performance (avail at Summit) makes a carburetor intake for just a little over $300. It has the provision to drop in a conventional distributor, once you remove the existing cam driven oil pump drive.

 

Aren't these LT1's Optispark? If you use the Optispark, then you need to use the computer. If you go to a carb and regular distributor, then you need to change the cam to drive the distributor/oil pump.

 

No you don't. There is a cam driven oil pump drive down there. Remove that and stab in a distributor.....provided you have a distributor hole in the intake manifold. Optispark would be abandoned, or can remove it and plug the hole in the timing chain cover.

 

They are but the LT1 camshaft still has the rear gear on it. I was beaten my 69. :/

 

How would I go about dropping the fuel tank and modifying it for an electric fuel pump?

 

Thanks! Didn't realize the cams still had the same setup for oil pump drive.

 

They sell a kit that gets welded into the tank to adapt it to in tank pump and return lines. Here's a video to see it:

The other option is to choose a modern in tank assembly you want, and then cut the existing tank to accept a flange from the junkyard, or one you built to fit the new pump/sender assembly. Remember that any changes you do to the gas tank should not be done until it's clean and free from any residual gas or fumes!