Ford 9s were/are the choice of drag racers that might want to change the gear ratio quickly from one track to another, 1/4 mile 1/8 mile, lighter and much less rolling friction and plenty of em around .
The center section can be changed out in less then half an hour on a 8 3/4 we do it all the time..the 9 inch is no better then an 8 3/4 performance wise plenty of guys running in the 9's with out a lot of money in them..by the way NO ONE i know uses one of those turd rearends in their mopars that i know..its either 8 3/4 or dana...
