1963 Valiant differential rebuild kit and ring and pinion gears
i can't be of much help, but what i can tell you is that there's is a bunch of stuff that's NLA and there are at least two different 7.25 variants in small bolt pattern-- ie up until '72 (and then numerous others in big bolt).
number one on the hit list is that the spider gears are long out of print, so you're either hunting down nos/dead stock or used. no matter what the description says online, do not be fooled, the later dakota does not cross over.
i know that there's two different yokes, one for the each sub set of gear ratios. however i can't tell your what the break down is on that. so just keep that in mind when ordering ring and pinion.
some stuff from the 10 bolt can interchange with the 9 bolt. the 10 is c-clip axle and started around 1981, the 9 bolt is not a c-clip axle.
the last one i did was ages ago and i used motive gear. thankfully it was a SG unit so it was a straight R&R job. anyway, might be worth an email over to them and see if they still stock those gears.