I prefer junkyard parts with a warranty to a. Also, picking and choosing lets you make the truck better than Jeep ever did. You can improve the transmission, the t-case (for awd), the front U-joints, or most importantly, the gear ratios. :D That's what I'm doing with my 90 (although that one was 4wd to start with). I've added an external slave, NP-242, and better gears to match the bigger tires. The costs mostly depend on the junkyards you have access too. What are your end goals? Lift? Tire size? trails? street-only?