They dont use inner seals on rear 60's , the hubs run in gear lube.I don't think the carrier bearings changed I think its just the inner seal your worried about. Just my $0.02
Just cut yours off bore and replaceSo changing the spindals to the late model 35 spline spindals?
If your going to spend $$$$ for shafts get the 35 spline and dont look back, do it once and do it right, besides I dont belive any body makes HD 30 spline shafts.sounds like alot of work, maybe I'll just buy some quality 30 splined axles and call it a day?????