Re: 637 V8 gas engine
I believe I put your video on the boards over at Heavy Haulers on the '67-'72 Chevy truck site. We have some 637 fans over there as well.
I'm also the one that used to drive a 637 V-8 Gas in a GMC J-9500. It was a '71 model with the very rare combo of a 10-Speed Road Ranger behind it.
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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
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