Got the engine full disassembled

[Meep-Meep]

I ran a 700 DP (4778) with the 4 spd setup and it was excellent. I'd start small or vac secondary and work up.

 

[dantrap]

The 750 Dp is a good piece. Summit list them for around $440, so if its a clean unaltered carb thats a good price. It should work well for your combo.