Carb recommendation 440

LSX (427ci) guys are seeing 20-24mpg often. Tuning, gears and aero
Computer controled, roller cam, F.I., OD trans etc.... ????

I acquired a Edelbrock 14073 High Peformance 750cfm mechanical secondaries carb. This should be a good interim solution while I save for the Holley sniper setup right? Also, with this carb on my 440, do y’all think a 14”x2 air cleaner would be sufficient (height clearance issues)
14 X 3 at least if you have clearance. With that hood scoop, I think you'll have the room.