8.8 swap
I agree, as long as the business end of the snubber assembly is centered over the pinion area on the casting, and in positive contact with the housing there should be very little to no stress on the mating flange.
As far forward as the 8.8 pinion yoke sits compared to an 8.75 i wont be surprised if the bumper will end up sitting straight above that flat spot on the casting right behind the yoke.