Have you messed w/ the carbs yet? You might want to up the jets to 66 or 68, try a 4.5PV, and go down on the outboard springs. You might also want to try 31 squirters and up the accel pump shot. But I'm guessing your main issues are the converter and gear. Those 509 cams desire 3000+ stall and 3.91 gears.
I'd try to add some timing, 36* full in at 2200rpm, then re-adjust your carb for best vacuum.