In my case, the entire brake system had to be completely redone anyway, the car was originally small bolt pattern drums all around with the crappy 7 1/4" rearend, and the Power kit was only 100$ more than the manual kit at the time. That being said, after all the issues and stuff dealing with the power brakes, if i had it to do over i 10/10 woulda left it Manual because there was nothing wrong with my manual disc 70 Dart i had back in the day.
What sort of problems are you having with your power brakes? My mom wants me to add power brakes to the 69 Charger... She hurt her ACL a few years back and using manual brakes just isnt something she finds enjoyable at this point in life.
