how strong is the 8 3/4 #741 case?

The 741 has about the same size necked down where the bearing is as the 742 or 489.

I pulled a 741 case out of a 1967 US Forestry long bed pickup with a \6 and granny 4 speed that had 5.13:1 open. Had 17 inch split rims. We put a SureGrip on it and it was running strong 25 years ago when I lost touch with the guy I sold it to.