Quote Originally Posted by firebird77clone View Post
Current carb was purchased new, they never got it running right. This makes me wonder if the carb was even the problem.

All I've really accomplished so far is getting it back to a mechanical fuel pump.
Name brand carb or maybe from China? Does the carb adjust for idle mixture, changing vacuum as you go rich & lean, or giving you a clean lean & rich RPM change so you can balance half way between? When you checked the oil did you look for "sparkles"? I'd be wondering about cam lobes. Can you get away with just pulling the rockers & lifters, keeping everything in order, and looking through the lifter bores as you rotate the engine? Or check the lifters as they come out for wear? Did you check the compression, and do a leak down test to check valves? Lots of questions, I know, but you're chasing gremlins in the Chevette!