Hemi Swapping a perfectly good 70 Duster

Dantra said

I had an early 5.7 in another car that I had similar porting done and decked .030 and ran 6.1 springs. Had to run 6.1 pushrods on the intake side.. Still have a new set of exhaust floating around. Anyway, it was great combo with a mild cam and a 100 shot

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Personally, I think the only thing wrong with a 5.7 is the cam. It's better than a stock 5.9, but it is similar in that it just kind of falls on it's face at about 5200 rpm. Put a mild cam in it and it no longer feels like a truck motor. That's why mine is getting a 6.4 M6 cam.