Perhaps I should clarify a bit. My car is a 1970 Duster 340. Just starting a ground up restoration. Has 5x4" on front with disc brakes, 5x4" on rear with drums. Has '76 overdrive transmission. I'm interested is going to 5x4.5" front/rear so I can run 15" rims. Trying to determine if this is economically feasible and what rear end gears to run with the overdrive and 15" rims. New to the Mopar world, so my knowledge is minimal on issues such as this.
