What cars had Holley carbs?
 

I have an edelbrock carb and am looking to replcae it with a holley 600 or 650. I have a "you pick it, you pull it" type junkyard near me where I can get a carb for 30 bucks. I have every intention of rebuilding whatever I end up with. My question is what cars should I look for to find the right carb.

You will have to have better luck than me. At our "you wreck it" holley carbs are impossible to find. I think the guys running the place take them off before it can get to the yard. But to answer your question, ford trucks, 60' muscle cars, and mid eighties GT mustangs, just to name a few. Good luck trying to find any.