ID for Zenith, Holley updraft carbs pictures added

Anyone have some ideas on these?

Holley model 280 "Kerosene evaporator"

Zenith V4B (cast, raised letters) (Chevrolet Truck 1925?)

Zenith B13 (stamped in carb body)

I have some later Stromberg AAV type 2bbl carbs, I'd love to know how to sort out ID's for them, too. I can post photos if it helps any -

BTT. I also dug out an International Harvester brass carb with the following on it:

Cast letters appear to be 4-53T, stamped letters appear to be Y4"JA -

Could really use an ID guide for these, I have a couple others tucked away yet.

I'm working on a carb that came off of a '39 Allis Chalmers "B" tractor. It is also stamped Zenith B13. Any idea if this is original for the tractor? I need a kit for mine. I'm talking to a tractor parts guy and if I find out more I'll reply again.