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

This has nothing to do with the original question but I have seen many original 489 cases with a 7260 yoke. 10 and 29 spline alike. I have seen more 741 cases with a 7290 yoke than 489's or 742's.

Apparently there is a way to use 741 gears in a 489 case because I once bought a 489 not knowing it had 741 gears in it. Wish I would have written down the bearings and races used but I didn't