1967-72 with a 1973-87 booster?
 

Soo i have a 72 blazer.. with a junk booster on it.. and i have a nice booster and master off of a 1981(or so) truck.. im wondering if anyone has done this swap? or knows if its worth the hassle? Im on a tighttt budget so using what i have is always cheaper.. any help is appreciated! -Mark