I was turning 3100 rpm at 60mph with 3.91's, 26's and A833, so, I think you are in the ballpark.

Life is better these days with overdrive and 3.23's: 1700 rpm and + 4 mpg. No loss of acceleration either. Not sure why a 426 needs Slant Six gears to perform? shruggy
.


Mo' Farts

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