650 / 750 Double pumper Holley

I can find carbs all day long at about $200, I'm looking to build something that I can say "I did it" with. Surely someone has one laying around that they don't want anymore ($50 to $100 depending on shape). Plans are to put a Proform body and a billet metering plate and some billet blocks.

Going this way will help me better understand what happens when I turn the key, I like the feeling of building it on my own......