I just discovered, after doing the brakes on my truck.
The wheel cylinders on my truck had the same bodies, same casting numbers. Only the adjusters are different.
So buy 4 of the fronts and swap the adjusters over.

My truck is a 50 1 ton with Huck brakes
Jeremy

1950 Chevy 3800 1-Ton Long Bed
In the Stovebolt Gallery
More pix on Flickr

Sold all the bikes, leaving California behind.