I need to start thinking about an HEI distributor for my 292 project. I have 2 that I've found in the wreckin' yards over the last year. One is out of a 1980-ish Chevy Pick-up, and the other is older, I think. It was in a '69 Chevy Pick-up, so I know it was not stock, but it just seems older than the other one. One of them has nylon pads that the weights seem to ride on, the other does not. I would like to rebuild these, more to learn how as well as learn more about distributors in general. Any advice? Where does a guy find parts for them? Are they still available from GM?