help !!!!

The disc brakes are interchangeable and you don't have to use a booster with them. My Cuda has manual discs and works fine. But man to change all the frame rails is a huge job. BTW: It's not a full frame car so you'd be changing the front section and rear rails independently. My guess is you'll run into more rust along the way too. First thing on a old car is to check the frame over good. The body can be decent but remember the frame is what's underneath taking all the beating and getting crapped on by winter stuff. I think I'd rather change out the roof than all the frame rails but that's just my thinking.