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Old December 20th, 2021, 02:28 PM
BillT BillT is offline
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Join Date: Jan 2013
Location: Moneta, VA
Truck: Drove and Owned Many
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Default Re: The fuel efficient GMC V6

Originally Posted by Prowbar View Post
Hello Bill,

If I may ask, what do you mean with a super tune?
Also, what gear ratio did the rear axle have?
Plugs, Points, Condensor, Wires, Air Filter, Cleaned and Re-adjusted the Carb to the highest vacuum, set the Timing a few degrees advanced. Also ran a straight-thru Muffler for less back pressure.

The Rear was stock, original. I never really checked on it, but they were probably 3.73's.
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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