The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What kind of gas mileage do you get with your 67-72?

gmc684x4 · 08-16-2020, 05:12 PM

I used to get 13 to 15 in my 68 k10 350 qjet headers 4 speed 3.73 gears and ran about 32 inch tall tire

I would get less if i walked on it

Building it back into a c10 with l31 350 5 speed havent opened the diff yet to see what gears i have for it yet
Going with a 28.5 inch tall tire keep it stock size and proubly a 2.5 / 4 inch drop

08-16-2020, 05:12 PM	#69
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: What kind of gas mileage do you get with your 67-72? I used to get 13 to 15 in my 68 k10 350 qjet headers 4 speed 3.73 gears and ran about 32 inch tall tire I would get less if i walked on it Building it back into a c10 with l31 350 5 speed havent opened the diff yet to see what gears i have for it yet Going with a 28.5 inch tall tire keep it stock size and proubly a 2.5 / 4 inch drop