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Re: MPG and Manifold Vacuum
2142 rpm at what speed? I think most carbed engines start running pretty good after 2000 rpm. I am amazed at newer cars that can pull 75 mph in OD at 1600 rpm's. I know my old 350's couldn't do that.
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76 Chevy K20
76 GMC K15
77 Chevy C10
77 Chevy K10
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