Drum vs Disc, Power vs non Power

I keep reading everyones opinion on SBP brakes or LBP brakes. Or even if an A Body car needs a power brake set up. On one thread one guy wanted to do power drums, He got a reply as its not needed due to the A Body cars weight. If thats so then Disc brakes arn't needed either. As a good 4 wheel drum manual brake set up and new formula brake shoes are just fine, So why go to the added expense of swapping from SBP drums to LBP disc then and the added expense of new wheels if you already own SBP Rallys? Oh I know some are saying cause you get a better look and better wheels in 15''-17'' rims. And I think some just like the way Disc brakes really look and so do I. Back in 1972 I went to a junk yard and got a set of SBP disc brakes, then while I was in Holland a guy gave me a set of SBP Rallys off his Duster , later I nstalled a power booster and what a diffrence it made in stopping and comfort feel of the brakes. Now I still own my orginal Duster and since have aquired another Duster. so as not to waste or try and sell my extra parts Im using them on the second Duster and yes It'll have a 4 wheel drum brake set up with a power booster. I'll save money rebuliding the drums as most SBP disc or LBP disc will cost me an extra $275-300 which is what I'll be spending to rebuild the drums, And I wont need new wheels as my Rallys will go on the seconed Duster, I'll post my results as I think it'll be a good project to see how it stops and feels