Finally went ahead and ordered the $999 full front/rear disc brake conversion kit from JT for my ‘63 FJ40. Even though it’s listed for 8/70 - 9/75, JT said it would work with some slight mods and if I didn’t have riveted rims (which I didn’t). Also bout the u-bracket for mounting the master to get past the firewall rib. Ordered a mini-truck booster too. So had to do a couple of things - make a longer master rod, do some grinding in the calipers, and machine the front rotors, 9mm to 10mm line adapters, and put some longer wheel studs in. Love it!!