Get the spindles, hubs, rotors, and calipers from a 2nd gen (87 and up) 2wd ram - 50 / MM - they have vented rotors. The 2nd gen hubs and calipers with fit on the 1st gen spindles, but the caliper bracket bolts and brake line won't clear to tighten them. Or you could get AIM drop spindles which are made like the 2nd gen spindles for caliper mounting. The 2nd gen rotor by itself will not work with the 1st gen caliper due to a different offset of the rotor to the hub. Once you make the switch, you can get Hawk performance disk brake pads off ebay for $9.00 a set.