Would a Holley II 4 barrell rebuilt carb fit a 1979 El Camino w350 from 85 caprice an edelbrock performance intake manifold w emissions?

in most cases yes. you might have to block off egr ports or something of that nature but they make the plate that bolts on to cover that port. i put the same set up on a 350 out of a caprice and it runs great. if you still need the egr you will just need to hook up a vacuum hose. in most cases they don`t pop your hood at an emissions check so using the egr is up to you.