Re: Fuel Mileage
My 1966 GMC 3/4T, 400 Auto, 351 V6, Gear Vendor OD, 4.10 rear gear. Holly 500 re-jetted leaner and HEI, I average mixed driving 12 MPG.
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Clyde McKaba
Abbeville,SC
1961 GMC Suburban 4WD 305 V6, 4spd
1966 GMC 3/4T P/U 351 V6, Turbo 400,Gear Vender OD
1969 GMC Suburban 1/2T
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