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Old January 13th, 2022, 11:34 PM
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Quigley Quigley is offline
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Join Date: Mar 2013
Location: New Hampton,Iowa
Truck: 1966 1000 Wideside 1962 1500 Wideside 401 Magnum
Posts: 187
Rep Power: 110
Quigley will become famous soon enough
Default Re: The fuel efficient GMC V6

When I still had the 305D in my 62 1500 with 318 three speed and .456 rear gears I got 15 mpg on trips averaging 60 mph, couldnít hardly believe it but it did. Now I have a 401 magnum with a 650 Edelbrock EVS2 and a 319OD trans and am getting 12 on trips. Pipes are pretty black and I think itís a little rich. I put a bung in the exhaust and acquired a air fuel ratio device ,but have to wait till spring and the salt is off the roads to try. Has anyone tried this approach or tried fuel injection. Dave
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