Purple Shaft 280/280 cam

A buddy of mine ran one in his 318 Duster years back to the tune of mid 13's. Not a bad lil'ride.

Your not going to get a smooth idle from a MoPar cam. Unless perhaps you can find one of there "Improved Idle" cams. There ground on a 112 centerline rather than the 110.

Crane cams makes cams on a 112 C-line as a norm.