Late '41 Flathead, what does main pulley look like?

Recently I bought a large collection of parts from a 30 year collector. I'm slowly sorting through it all.

Amongst the items I bought is a late 1941 24 stud flathead, this engine has a single belt with a snout on the generator with the fan on it, this same belt also drives the water pumps. The engine is in great shape, so I'm cleaning it up to store it for a future project.

The only item I'm missing is the main pulley. But I've got a box full of various pulleys, also from this some parts collection. Now I could try them all, maybe 30 or so that look like potential candidates, but that would take a while (ok, way too long)

So question: Does anyone have a picture of the main pulley on an early 24 stud flathead (before 59A) with the single belt? Or maybe a part number?

Thanks,

 

Single belt pulleys with no accoutrements just come in two flavors: Single sheave, little to nothing protruding in front fits short-crank motors 1932-38. Single sheave with a tubular snout sticking out in front fits long crank...came on '39 standards and commercials, sold over the counter as part of the packages used to install late replacement engines in the early cars. The long one is somewhat scarce, but you can cut the extra parts from the various double or flanged car pulleys used '39-48.
Early pulleys will leave a big gap behind the nut and washer on '39 up cranks and can't be tightened...
'39 deluxe--1941 pulleys have a flat flange to take the fan, and '42-8 have two widely separated sheaves, heavy trucks have two sheaves close together.

 

If I read your post correctly my engine should have come from the factory with a dual belt setup?

I have some later dual ones for sure, I'll plan on modifying those.

The engine is a 221 ci with no oil galley bumps on the lower sides and a raised intake manifold area, I'm fairly sure it's late '41. But who kmows what customizations have been made since.

 

A '41 passenger car had a single pulley sheave with a flat 4-bolt flange to take a fan...like most '39, all '40-41 passenger.
That general block design is right for 1941, also used 1942 and during WWII.
All long-crank 1939 up pulleys can be swapped on '39 up cranks.