For a 4150 carb , I recommend either the Indy 2D or the holley SD. On the dyno they were pretty close to each other on my 500" engine in the 550 to 580 hp range.
If you use the Dommy - I don't know. If you use the Indy 2D with a Dommy and adapter, you'll have hood clearance issues, possibly not with the SD.
