The 741 and 489 cases both use the smaller front pinion bearing, the 742 use a larger front pinion bearing and race and they are the ones I prefer to use on any Mopar that will be beat on heavily and drove aggressively thumbs scope

Last edited by Cab_Burge; 10/07/16 02:54 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)