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

famous bob, Yes that is correct.
the point is that even though the 489 pinion is a much bigger pinion then the 741, they all have the same diameter at the Yoke splines. Sooo, those that have snap a pinion at the Yoke, it wouldn't have matter if it was a 741,742 or 489 the material is the same thickness. IF it failed at the cap....There all the same there too........If it failed at the teeth.......well the larger pinion at the bearings of the 742/489 would be an advantage.