Re: 637 ci
A quick search found this:
http://www.oeltd.net/doc/GMC_Manuals...%20X-6A-01.pdf
Although it is dated July of '67. I believe the 637 started in 1966.
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Drove and owned many, but some of the more interesting ones were:
-'60 GMC 2500 Dump, 305 V-6
-'62 GMC 4000 Flatbed, 305 V-6
-'62 GMC 6500 Flatbed Dump, 478 V-6
-'67 GMC 7500 Box, 6V-53 Detroit
-'71 GMC 9500 Flatbed Dump, 637 V-8
Last edited by BillT; April 30th, 2020 at 10:37 PM.
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