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Old 07-18-2017, 11:53 PM   #5
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 20,269
Re: 8 lug to 6 lug 64 GMC, also V6 to V8 swap

All GM 1/2 tons from '55-'70 were 6 lug. There was no such thing as a heavy 1/2 ton back then.

To change a '60-'66 3/4 ton to a 1/2 ton, you will have to change the entire front suspension including the crossmember from a '71-'86 C10 or a '87-'91 R1500. Then you will need the aftermarket 6 lug rotors.
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