1 Barrel Holley Economaster on a 250

[EARNHARDT#3]

I'm tired of this finicky Rochester B. It runs ok but it's not right. Timing, vacuum leaks etc are all ok...it's the carb. I even rebushed the throttle shaft so it's not leaking. I read a little about these old Holley Economasters working pretty good. Just wondering if anyone is running one or if anyone has any experience with them. I'm not interested in running a 2 or 4 barrel with an adapter.