I just purchased a 1968 Impala SS Coupe. To make a long story short, my budget for a project car was enough for a mid 80's GM, mt wife wasn't impressed. We looked at a 68 Impala and she liked it, but the rear quarters were more bondo than metal and we couldn't come to a deal with the owner. My wife found another one and increased the budget enough to bu it. As she likes to say, " I found it, I bought it, it's mine!"
Short term plans are a disc brake conversion for the front brakes, redoing the headliner, seats and adding a Classic radio, and swapping out the steering box for a tighter one. Long term is a motor swap, either a big block (my first choice), or building a 383 (probable choice as I have kids).
That's the top of the list so far. I'm also looking at the SSBC kit. My car has power brakes so I'm trying to figure out if I can retain my current power booster, or if its required or easier to replace the master cylinder with a power booster from the company supplying the brake kit.
Those are pretty pricey My goal right now is to improve the drive ability without ruining the character of the car. One of the things I like is that you don't see alot of the coupes. Another thing is that the car isn't much bigger or heavier than my father in law's Super Bee clone.