Originally Posted by subzali
Another couple of thoughts in addition to my post above:
-I have heard of a V6 caliper swap that can be done for increased stopping power. I would have to research to see if that applies to 40s as well as 60s or if there was a year cutoff or what.
Applies to FJ-40, 55, 60, 70 series cruisers with leaf springs, and solid axle mini trucks.
As long as you've got disc brake knuckles, you can upgrade to the V6 IFS calipers. All it takes is a little trimming of the backing plate, and maybe some grinding on the fins of the caliper to clear stock wheels (if you've got them).
Super easy, I can't tell much of a difference, but the V6 IFS calipers are still available from Toyota, and I would expect those to remain in production for quite some time at reasonable rates.
Works so well that I just trim the backing plates any time I have them off, because whenever I rebuild a front axle I try to make the swap, and even if I don't, I will soon enough.