Re: 1961 GMC 5500 Tilt Cab Project
Upgrade the carb and get an HEI and that will help. You will not get good mileage with Any gas engine. Only a diesel swap would do it. Matter a fact a bragged about big block chevy would get just as bad a mileage as this v6 for a little power gain.
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I'd keep the 401, big and sought after motor; but if you do decide to part you can send it my way. lol
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1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
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