Quote Originally Posted by JerryBP View Post
JFZ Racing brakes were comon in the 70's & 80's, a lot of open wheel cars ran them and also some sportscars racers I think they were aquired by Sierra Racing products. As far as I know the were always American made so they are probably 7/16" SAE threads.
Sierra ( http://sierraracing.com/cgi-bin/list...?file=specials ) look about half way down the page and see if these are your calipers.
Thanks Jerry, I appeciate it...I will call them!