WOW, AC on a model "A". I see why you added the speed parts. I played with those Holly Webbers in the 70's on VW's. They ran great on the street,but not so well off road. The float bowl is open to the venturis,hit a few whoop de doo's,and it splashes fuel down the throat,flooding the engine. I ran gravity feed to my 97's in the 60's and had no problems,because I never went up any hills. Now I live out in the country with lots of hills,that is why I had to add a fuel pump. I am not sure if anyone noticed the Simmons High Speed head. That came with the car,and I never heard of it before.