I know a lot of people have put in after market carbs. I was hoping to put a after market one into my 4af engine but i wanted to build a pressured chamber for it so that a hood scoop would line up and force the air in. Any suggestions as to the kind of carb i would need or what would give me a good balance between power and fuel economy. I am porting the intake manifold and putting a pace setter header for the engine as well. Please let me know if you have other ideas about the engine and how to increase the performance. I dont want to do a swap, just putting that out there.