What I did to my 85 runner is used 2nd gen 3.0 v6 4Runner ifs brake calipers, master cylinder and used a dual diaphram booster off a t100 truck and fj60 vented rotors, truck stops my 37s on a dime if needed. But your options are pretty open here, you can use 4cy ifs calipers as well and don't need a bigger booster but a 1" master cylinder is a must!
