I know at least the 52-59 3/4 tons (3600) had 12" drums on their rear. They should fit anything you want on them.

I know that swapping to later model 14bolt drums can be done also. I haven't done it, so I don't know the specifics.

Here's a link that may help on the 14B conversion.

http://67-72chevytrucks.com/vboard/showthread.php?t=536119




1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
More pix on Photobucket