Hello welcome to the forum hope you enjoy and learn as I have here with that said I can tell you that is a midland ross booster was uses on 56 through about 60 ford and many other uses I used one on my 32 when I upgraded it in 1974 went to a corvette irs and corvair ifs and and what they call a fruit jar lid m/c from like a mid 60's mustang and it worked pretty good ( but my choice of suspension sucked ) so in about 84 changed it to xke but kept the brake sys that was the sys jerry kugel recommended but now I have the car down for a complete redoo and am changing to the married m/c booster after market corvette duel sys which I think offers much more fail safe insurance hope this helps you some if I can git it back together before I die. (GETTING OLD AIN'T FOR SISSYIES ).....TED