Where to fing gears for 741 case?

Craig NY said
will these work, they were listed for a 42 case but it states that its compatibale with a 41. Eaton Det. locker is already on the way!

According to the link the ring and pinions are not interchangable

http://www.yukongear.com/DiffDetail...ler&DiffID=8&DiffName=Chrysler+8.75+(89,41,42)

Chuck