Early Holley Carb.?
 

I have an Holley carb. that I am going to restore and after I broke it down I found that instead of having a removable secondary well, it has one that is machined into the casting. The inside dia. looks to be the same as the removable, smooth and no threads. I saw this after sandblasting. Could this be an early one? has H on top and bottom with no letters on bottom front side of bowl .
Thanks, JD

Re: Early Holley Carb.?
 

Yep, presumably the,1928 model- no secondary well, cap and main jets in line , double venturi

Re: Early Holley Carb.?
 

Thanks, it has jets in line and no secondary well, it had a single venture installed that someone replaced....JD

Re: Early Holley Carb.?
 

Bratton's sell a reproduction double venturi. If you look on the side you should see a boss where a pin was inserted to keep the venturi from rotating. Someone has probably ground the pin off to allow the single venturi to fit.

I have a similar one and had a friend drill out the old pin, make a new one, and insert it. I installed one of Bratton's double venturi's and the carburetor performs well.

Tom Endy