holley 4150 vs. 4150HP

hey guys sorry i didnt respond earlier...

first off, the carb i am using is getting done by a company called dillman race carbs and induction (search him on ebay as drc&i)...im getting a 750 dp no choke with all his stage 4 mods (they are listed) plus screw in bleeds, for a very good price...for the HP main body upgrade, he wants 75 bucks...he's actually done testing with his carb against 13 other brands (quickfuel, proform, willys, etc. being some...all same afr on same motor and same cfm, his carb beat all except the two boutique brands and quite signifcantly over the prosystems...pretty good work imo)

terry, my intake is an rpm air gap and cam is a mild single pattern comp 280H (480 lift, 230 duration at .50 280 at valve)...very mild motor, in fact the motor is stick except for the cam, intake, headers and now carb