I just put a holley webber 5200 on a '59 Chevy 235
and It has no power at all. I can't go over about 25 mph. I thought this carb was supposed to be bigger and allow me to go fast but it seems like the opposite.

I made sure both venturies are opening and that it's getting plenty of gas but it just seems like it isn't getting enough air or something.

Anybody know why this thing has less power than my old Rochester 1bbl? Otherwise I just spent a ton of time and money to go slow!!!!