torsion bars or coil springs? 2wd or 4wd?
if you have a torsion bar truck you can step up to 12" rotors fairly easily. goin with cobra brakes opens up a can of worms that may not be worth the effort in the end on a torsion bar truck vs the 12" upgrade. the cobra calipers have smaller pistons than the ranger stuff. less piston area = less brake force.