So I had a plan to get an ls1 and a t56 and rebuild by rear end (3.23 open rear) to have a posi and 4.10s or maybe 3.73s but I soon realized most of that is in a 4th gen. So I'm planning now to buy a 4th gen z28 (01 or 02) and take the entire drive train and put it in my 92. I want to know what would be the most difficult thing about this idea? My 92 already has the engine, trans, misc under the hood stuff, driveshaft, and exhaust removed. And I'll be taking off the rear soon. I'm worried about compatability issues. Any advice?

 

https://www.thirdgen.org/forums/ltx-...third-gen.html

 

Moved it there.

Start by reading the sticky in the top section of the forum.

 

It really depends how far you take it as well as your definition of "fit"
I've got the entire harness from my donor car, motor, interior, chassis, etc. as well as the gas tank and ac box (though it's going to be replaced with turbo piping here soon). There are many ways to go about the swap and trade offs of extra hours spent vs extra money spent (it's all time and money right?). In my case I bought a tubular k member with ls mounts incorporated so I didn't have to cut the k member or make hybrid motor mounts.
Like 57 said, read the stickies and look at other builds here but you're on the right track. Most importantly, ask questions! The knowledge that's on these forums can help you miss lots of blind spots.