Mine is a 76 that started life as an L82. It has a 383 stroker with a nice cam and a four speed. I really want to put a Tremec 5 speed in and do something more on the suspension (maybe coil overs). The car had a frame off back in the mid 90's so the mounts are all good and it's in very good shape. I added Vintage Air AC to it, it was an original AC car, but the compressor and evaporator had been pulled and I wanted a new system.
Only negative is it LOVES gas!!! 12mpg.
Coilovers won't do a lot of good. The suspension on those cars isn't all that good to begin with.
I still like them, despite my experiences working on those cars!