30 spline Axeles in a 8 3/4

35 spline will give peace of mind and last longer. Perhaps you can score a 35 spline spool for sale.

35 spline 8 3/4" and Dana 60 axles are the same thing, except for length requirements. The ring & pinions are the weak link in an 8 3/4" so the Dana 60 will be a huge improvement in that respect as well as having a much stronger housing.

You have a PM.