Depends on how involved you want it to be. Some guys hit the used section for a vac pedal, there are kits at kit and, eBay and other venders. Some guys want a different vac booster from an impala or a fancy wildwood mc. If you want ez hit a vender and get the kit. If you have your own ideas you can order stuff for a mcss(mc and vac booster) or regal or any g body. Mc can be had in different bore sizes, 7/8", 1", 1 1/8" and you can go aluminum w/ plastic reservoir, iron reservoir or one of the after market as mentioned above.
I went hydroboost as I didn't want to goof with locating a different pedal. Your car, your call. If it stops the car it will be better than the iffy powermaster.