Are you running your timing locked? Or are you allowing some advancement? A lot of it will be getting the timing happy (engine will decide), jetting will be a big part, and not be afraid to give it more CFM's - I really think your combo would like a 850 DP, especially on a Dual plane. Dual planes need 100 more cfm's vs single plane. Unless by "race carb" the brawler actually flows more than 750. Key is be willing to try, and explore. May not be the answer in the 1st or 2nd trip to the strip, but be persistent and it will pay off. The obvious is getting the power to plant in the 60 ft.
