Swap help

I'm about finished (for the time being) with my four door Dart. Body and interior done 340 added 8.75 rear also. I'm not satisfied with the stopping, I have SBP manual breaks with drums on all 4 corners. I'd like to change the breaks to a four wheel power disk setup LBP and go from 14" wheels to 15". I've been looking through the threads to find info on a complete setup to no avail. For the rear I know I'll have to change the axels so I might as well put discs back there so I don't have to buy new drums. I'm looking for the best bolt on 4 wheel disc setup from one source that I can find. I'd also like to change all the front end parts at the same time. Any suggestions on sources and kits from someone that has already done this swap would be appreciated.