single plane will work better .put a spacer under the carb. it will give you more hp

I am now hearing that it came stock with a team G single plane and a 1050 so i was heading in the right direction.

what is the x dimension of your drive?

if it is low consider a shorter drive before you buy a prop

i gained 10 mph, my x was soblow the cavitation plate was in the water @ speed.

big big jets on the holley. or go with an 850dbl pumper or a dominator but i dont think you need that much a 1050 dominator with big jets will support 700 hp all day. the 850 will have better low end/idle characteristics. nothins worse than a loaded up engine when you need to be putting around