1975 duster

Do you want 10s or 13s?, thats a big margin, 13s is a breeze, just install a mild 360 magnum with alittle gear/stall & its done, for 10s look into a 400(451) or 440, I ran high 10s with my 75 Duster, Just lighten it up, I ripped the bumpers/bracing off mine F&R, that alone was worth 186 lbs., install an aluminum radiator, racing seats & left the rest of the interior in other then the back seat, MS & Brakes, still had all the steel/glass, car weighed right at 3000 lbs. without me.