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Old 03-20-2020, 10:07 PM   #6
1976gmc20
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Join Date: May 2015
Location: Montana
Posts: 3,696
Re: Small block 400's???

I worked for a dealer 1975/1976 and they were just becoming available in K models so probably the 1976 model year.

It seemed like a big deal at the time, but I drove the new ones and I couldn't really tell the difference between the 400 and the 350. Maybe I would have if I took them out on the highway or up in the mountains.

My 1980 350/SM465 seemed to have about twice the power of my 1973 350/TH350.
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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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