GMC (and Chevy I think) used the short cap distributor in '52 and earlier and the tall cap in '54 and later. I can't remember about '53. But you can't just put the tall cap and rotor on the '52 and earlier distributor, nor the short cap and rotor on the '54 and later distributor. You have to swap the whole distributor.
I have a '54 Chevy distributor in my '52 GMC.
Last edited by Bill Hanlon; 09/04/2023 11:38 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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