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Old 05-27-2019, 11:20 AM   #5
1976gmc20
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Join Date: May 2015
Location: Montana
Posts: 3,696
Re: Auto vs manual costs ...

Seems like folks are just pulling out and throwing away SM465's .....

I really doubt you would see that much difference in gas mileage, and anyway it would probably take a long time to recoup vs the extra costs of buying/fitting a 4500.

I wish now I had converted my 1973 K-20 from TH350 to SM465 instead of trading it off.
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Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD

Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner
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