Majority of disc brake conversions will change your front wheel bolt pattern from your OEM 5 on 4" w/ 7/16 lug studs, right hand threads on right side, left hand threads on left side,
to the 5 on 4.5" with 1/2" lug studs, right hand threads both sides.
2 spares and 2 lug wrenches?
There are a few aftermarket disc brake setups that do retain your OEM wheel bolt pattern. One of those adapts some Toyota rotors, calipers, and pads, but I'm not sure that works if you have 9X3 drum spindles. Good luck any way you go.
