Setup for 750DP on this 408

What carb was on it for the dyno pulls, there is your baseline.

You didn't say the intended use, street, street strip or drag only
A 50cc pump 'can't hurt' ... you can adjust the delivery volume/time with cams/nozzles

BTW: sounds like a real nice piece.

Went ahead and ordered the 50cc pumps. do you know if I can use the 30 cc pump cams with it? the kit comes with two cams, a different lever, and the housing.