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GMC V6 and V12 Engines Engine repair and rebuilding

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Old May 2nd, 2017, 05:52 AM
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Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
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Default Re: Fuel Mileage

305E with a 600 cfm eddy 4 barrel, dual exhaust, hei, 32 inch tires, 4.11 rear gear, sm420. Best I got was approximately 13 at 54 MPH. Round 2400 RPM.
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1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
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1977 Chevy C20 572 BBC/TH400
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