[rotorwrench]

RevKev6, I doubt I'll see any loving there. I looked at the 1948 thru 1955 truck parts catalog and it doesn't list a dual belt water pump pulley sheave for any of the flat head 8RT 239 pumps. Y-blocks have a similar shaft ID to flatheads but they don't list any there either. My guess is that if they show up that they were a special item for fire trucks, buses, or industrial applications. I don't have information for the 337 or Y-block big truck applications (F7/F8) but they are likely different anyway. Chuck some aluminum bar stock in the lathe and turn some might be easier than finding them but you never know.