I've just come across this thread and read it all the way through, and I think you've taken this from good to great with the last couple of adjustments you've made.
My favourite era of Fox, with one of my favourite builds.
Small word to note... the internal roller on the stem EATS brake cables as the radius is so right.
A really good switch (and original to your levers) would be to switch to the braided 2.0mm XT cables as they're super flexible as well as stronger. Hopefully this will keep upi alive longer in the event of a breakage.
Bicyclist.cc has them NOS. Also would provide opportunity (respectfully) to change from the '93 cable straddles to the period correct hanger.
Loving it though, great job, and a great find on the grips and bars.