Hey all,
I just purchase my first Suburban and I have a big question. I bought a 94 that is extremely clean and has been meticulously maintained, complete with every receipt for literally everything ever done. I even have receipts and records for tail light bulb changes. The only problem is that it has 212K miles on it. I got a great deal on it and I would love to put a Corvette LS engine and tranny in it. Has anyone done this and are there any huge issues with it? I would also put in the ecu and complete wiring harness from the new engine. What am I in for here?

 

I'd research the differences in the two engines and trannys.
The corvette engine and tranny are set up for a whole different purpose than the suburban. You might end up with a suburban that has less bottom end grunt but a better top end. Not really what's needed in a vehicle designed for towing.
The suburban 350 has a high stall torque converter that will let the engine spin up a little bit to help it move the weight better. If the vette torque converter locks up sooner you might get a worse towing ability than you now have.
My '96 K2500 weighs in at 6680 lbs with me in it and a half tank of fuel. I'm sure a vette weighs somewhere in the neighborhood of half that.
I'm not sure the vette tranny would last long either because of the weight factor and gearing.
Personally, I'd get a chip for the ECM in the suburban, headers, aftermarket performance air intake, and open up the exhaust system with duals or performance exhaust system.
Good luck.