[51504bat]

8rt truck pumps are what you need BUT they are wide belts. You'll need to change the crank and generator pulley from the narrow belt car pump belt that you have on the '53 engine. I have an 8ba in my '39 p/u but I'm using narrow belt OCM Merc pumps instead of the wide belt 8rt pumps so I didn't have to change the crank and alternator pulley. The Merc pump mounting ear is higher than the truck pumps so they need a U shaped spacer to place the engine at the correct height on the rubber mounting biscuits. The OCM Merc pumps aren't repopped. I sent mine to Skip for rebuilding as well as a second set for spares but given Skip's quality/guarantee I'll probably never need them.