741 Housing, 742 ring and pinion..... can it be done?

Well was hoping someone would come up with the magic bearing race for installing the 742/489 gears into a 741........
If i ever come up with such an animal i will sure update this thread.
But for now, have a 489 house coming my way and have ordered 3.91 ring and pinion,bearing, crush sleeve eliminator, Doc Diff stock length axles with Green bearings.( my stock ones have been hammered on for close to 20 year now. (think i'm living on borrowed time with them.)