Hey Louis, is that EFI 8 a 4150 bolt / hat size? Is that 1200 HP WITH E85 fuel flows?
The problem with a blow thru on a Dominator size carb is the size of the hat. My 499 has a 4500 flange intake, but I think I could run an adapter and be able to use a 4150 size hat with my V7 Ysi if the EFI can supply enough fuel for E85 flows..