No-4 wheel drums with power. My question is can I use a later power booster/master cylinder combo from a later mopar with power brakes. I may have to get a kit to convert mine to front power discs if I can't find a power booster for mine. My power booster takes the old style master cylinder with 4 bolts attaching verses the newer style with a 2 bolt on master cylinder. As far as I can tell noboby makes the correct power booster anymore. I was looking at replacing mine with a newer style from the late 60s/early 70s that may match up to the firewall. The combo is from Leed Brakes and says that I may have to either adapt the new set to the firewall or make a new plate. I can do either. Just curious if anyone else has done that or converted to front discs.