My Combo, Right or Wrong!

A 750 cfm carb will do ya fine.
Desk Top Dyno info is off due to cam timing and actuall compresion values being off. But it's peak is 374 HP @ 5000 with 424 lbs. of torque @ 4,000. 385+ lbs from 2000 - 5000.
This info is not very accurate to a point. Actual head cc's are an unknown as head gasket bore and thickness, but comp. ratio worked out to be 11.5-1 on the 59 cc head chamber volume.
Cam timing is also off. Do you have a spec card? The program asks for lobe center angle (Cam degress)and intake centerline (Crank degrees) Moving these specs around 2 or 4 degrees on the program will alter results in a big way.