well for that idea what year pinto you have , they did not start putting power brakes in untel 1975 up,  I have converted them to Power brakes over the years , its a nice upgrade ,  but you have to have a donnor car because just having the booster is not enough , you have to remove the streering wheel assy from the bracket in the dash , then the bracket it self to remove the plate that is bolted by two screws on the inside of the firewall , the holes for both power and non power brakes on drilled into the firewall but you have to have the plate that the booster bolt to on the inside , once that plate is in you put everything back , next the brake light switch is diffrent also , but you can buy those new at the parts store , the next thing it does take a diffrent master cylinder , and the two brake lines to it are also diffrent , it will take 4 hours to do the complete job , less if the car is half apart , but if the car is a 74 down you may have to mod them to fit , the brackets are smaller , hope this helps you