I have a question, I'm doing the standard upgrade on my 70 dart replacing the 318/904 with 340/727 and the rear from 7.25 to 8.75 should I change leaf springs to an h-code spring or leave them alone...car will just be a cruiser 3.55 rear with no sway bars and still 890 /891 torsion bars...I have a set of super stock springs but think that's too much rake for the dart or I have some 340 car springs...leave them alone or upgrade????
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Upgrade the leaf springs or leave them alone....
