Does anyone know of a good list of exchangable parts between years for Chevelle's?

Well,....the 70-72 Cig. liter. All 71-72' rear til light bulbs...that's pretty much it.

Seriously lots swap 64-72. There is a pretty good book, "64-70 Chevy Interchange Manual". Lots of good parts from Buick-Olds-Pontiacs as they were A-Bodies too, and the 70-72 Monte Carlo (front suspension, dic brakes, deck lid, seats, dash,...)