Re: New 66 GMC ratrod project
David, Owning a 68 GMC I would have to say the differences really didn't go away until 1970. 1967-69 the V6 was still available, trucks were still being assembled in Pontiac Michigan, Dana rear axles were still used rather than corporate axles except on 69 1/2 ton trucks. There were differences in suspensions mainly on 4wd models. Power assist steering up to 68 and GMC specific colors like Palomino Tan, Terrace Blue and Ivory lasted till 1968.
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