IMHO. It’s time to ditch the split rims and upgrade to a set of either FJ40 steel wheels with the clips or a set of US spec late 40/FJ60 wheels.
Much easier and safer in the long term.
Just buy a new master and booster assembly. About $1200 brand new from Toyota and will last another 200k.
Easier, faster and more warrantied than having someone on eBay rebuild it.
Personally I wont trust an unknown person from eBay with my life (brake system). Not to say that his work isn’t...
I opted to not try and rebuild mine [04 V8 Runner) and just bought a new assembly from Mr Toyota for about $1200.
It’s a 1 banana job if you replace the complete unit and can be swapped in about an hour including bleeding the brakes.
Its more cash upfront to replace rather than rebuild but I...
Depending on the pump / engine block that you are using you may need a spacer between the pump and block.
it’s about 3/8” thick
the cams are the same from what I know.
Rotella 15-40 for the motor. (or any high zinc oil)
Any 80-90 or 140 is fine for the rest of the parts.
no need to overthink fluids for these tractor parts.