Technical Zenith carb id help

This is the carb off of my model A speedster pickup. A local guy gave it to me when I lived in Abilene Kansas when I was cobbling it together.



I looked all over on the interwebs. Seems Zenith made over 5000 different carburetors over the last 100 years. I know its not one used on a Model A, but maybe an Allis Chalmers tractor.

 

Aftermarket for an early 4 cylinder Chevy.

Jon

 

Ok.

But I'd like a model # so I can get a gasket kit.