Drop Spindle question

[asbill71]

I have a stock height 65 Suburban. 6 lug all the way around. I want to stay six lug, but want front disk. I have been scouting for 73-87 donor trucks to grab the control arms and spindles. But I also plan on getting drop spindles and springs. Here is my question. Is there a drawback to just ordering the "Conversion" spindles that bolt directly to my existing ball joints and tie rods? Then just buying rotors, calipers, brake lines at the parts store. I probably would have replaced the ones from a donor truck if I went that route. Except for rounding up small parts, ie washers and caliper bolts, wouldn't this route be cheaper since I plan on drop spindles anyways?