Hi badandy260----------This past weekend, I decided to install new pads on my '70 240. The car was equipped with Toyota 4-piston calipers when I bought it two years ago. I had been under the impression that the calipers were from a '79-'83 Toyota 4-wd, but they turned out to be from an '86. There are several different styles of pads and calipers from '79 to '86. Any of these will fit, providing you trim the dust shield.
I'm using the master cylinder from a '79 280ZX with my setup, but for normal street use the 260 master will work fine. IMO, the most important thing with this or any other brake mod is to THOROUGHLY bleed the system after working on it. This may involve doing the bleeding operation more than once.
Roadman
Gulfport, MS