Garz, Tri-Valley can do the machine work if you decided to DIY. I've heard more good about their work than bad so they're are probably safe and very local for you(Pacheco). As far as r&r the original motor, I know a shop over here in Rodeo that has a good rep. Probably about $2500 for the whole job(just a guess) and the good part is he owns a real nice 67 coupe so he'll probably do a good job. On the other hand if it was me I'd find out why it running rough before I went to all the time and trouble. It might be a cheap fix like a new dist cap or points or carb rebuild(water in the tank). Could be any number of easy fixes.