Drum vs Disc, Power vs non Power

I have a 71 Duster, After I broke the upper Ball joint on the passenger side I took the plunge and did tubular upper control arms willwood 12.19 inch drilled and slotted discs with 4 piston calipers and steel braided lines from magnum force racing. It was the best decision I ever made. stops amazing looks badass I will never suffer under drum brakes again. I cant wait to get a Dana 60 in the rear with discs.