In the 90's I had two 70 charger R/T s one was a stock 440-4bl 4-speed 3.54 with the exception of headers, Edelbrock intake and a Holley 750 HP carb. The other was bone stock 426 hemi auto with 3.55. They were pretty much even to about 85 mph then after that the Hemi would walk the 440.
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I probably should’ve been more clear when I’m referring to nuts I’m referring to the sleeve nuts as well as the common nuts. I know the kit contains 10 conical washers But on the two survivor 1970 340’s I’ve looked at I’ve only seen the conical washers used under the six bolts...