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Old 03-11-2015, 09:44 PM   #24
marvgarr68
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Join Date: Jun 2013
Location: kingman az
Posts: 573
Re: 77 gmc c35 dually 4-53t detroit

Lots of looks when its up high in the rpm. I was getting about 17 mpg but I found a fuel leak so that's fixed. I drive 30 miles a day I filled up on sun and I still have a full tank. Its a 15 gal tank I am guessing 20's. The rpms are at 1900 at 65.
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1976 k20, 350 built, 44/14 axles
1968 c10 6.5 turbo diesel,t5 trans
1977 gmc c3500 dually, crew, 4-53t, 5&3 trans
http://67-72chevytrucks.com/vboard/s...d.php?t=591188
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