Re: 67-72 C/K/T-40's-90's!
You never know, some fleet may have put in a large special order for 6V-53 7500 tandems with the small Road Ranger 10 or 13 speed and GMC decided to make it an R.P.O..
I remember you talking about a truck with a 637 gasser and a 10 speed. From all I have ever heard about the 637, that sounds like the ideal combination. Yet, most were built with 5 speeds. I wonder how the 637 would have been with a 5X4.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.
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