Call AED and they'll set you up (804) 271-9107 . When I got my carb from them, it was within 2 jet sizes and their pricing is reasonable. They'll custom build you one or match you up with one they have. Mine is a 750 ported, polished, etc and flows around 850. I didn't see your cam specs but if your running 230 @.050 or up on the duration, you'll want a 750 dp calibrated to your combo. If you're going to keep the stock heads, etc you'll want to keep the cam somewhere in the 220s @.050 range and run a 650 carb. In that case I'd save the money and buy out of the box.