I couldn't agree more -- I've been working on GM cars for 60 years, and was surprised on how awkward getting to things on the C3 was!  (And being a bit older doesn't help either!)

My advice is the same others have listed.... know what your getting. Alot can be hidden for you to find down the road. If your restoring it, expect to replace more than you expected.  And also important, keep track of your parts!!!! This guy is pulling his hair out trying to locate the 25th anniversary emblems that came with it, the chrome corvette logos for the sides, and the center caps for the wheels. I know for a fact i had them, after tearing the garage apart 3 times, they have not been located! All in all though, no regrets. 

Wow all this advice is so true. Buy the BEST you can afford at the beginning. Most likely the car has had several owners and each one worked on it sort of. End result can be disasterous. 

I've had mine for 49 years and I am still finding Bubba work each time I get into someting. I like working on them so any cost is worth it. I bought it when I was 21 so what did I know then.....

My rule of thumb is it will take 2 -3 times longer to get it where you want it, 5 times longer to put it back together than you thought, and cost 2 -3 times more than planned. The first trip to the gas station and the looks you'll get will probably be the big reward you anticipated!