Useless bit of history ............ I was on the rocks at Kirton with a mate (Coyote) now Jeepless
Me with warn shafted Dana 30 with high pinion.......... (under heavy excercise ring and pinion forced together.....)
He in TJ with low pinion dana 30.. ring and pinion forced apart under load.....
Both got stuck in same place.....I survived............ he made a strange whirring noise in the diff department..... and that was it for him for the weekend............
So yer shafts might survive but get youself a High pinion dana 30 from an early XJ tis a drop in for a TJ so they tell me.... otherwise you'll be hopping mad like Coyote