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Re: GM Semis
Just a couple and they were HE series fire engines. Seems that mose 637's came with large Spicer 5 speeds but the consensus seems to have been they needed more gears. A 10 speed or 5X4 would probably have ideal.
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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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