I would still recommend looking into maybe a scarebird front disc brake conversion bracket kit. It will reuse your spindles, and front hubs off your front drums. The scarebird brackets bolt in place of the front drum backing plate. It uses easily found and inexpensive Chevy celebrity calipers, pads, and hardware, and uses off the shelf Toyota Previa van rotors that you redrill to the 5 bolt 4" circle.
View attachment 1715398338
View attachment 1715398339