You just opened the biggest can o' worms since Chevy vs. Furd.
If I were buying new, I'd go Edelbrock, they run right out of the box.
If I'm getting one from the junkyard, I'd go Holley. Every single part is available at any parts store, and if you need to rebuild and tune it anyway, Holley's easier than Edelbrock. +1 the power valve problem has been fixed for years.
I'm still kind of partial to quadrajets, like the earlier poster. But they're expensive new, and they're not all that tuneable.
