I have a 1993 F150 supercab with 6in suspention, 3in body,302 engine, headers, 3in exhaust single glass pack no cat, K@N Filter system, power pulleys, electric fans, 5 speed, 38x1250x15 super swampers, lockers front and rear, 4.56 gears. The question is how do I find out what transfer case is best for my truck or is what I have good and does it make a difference? And how much money is involved for a dubler? Can I make my transfer gear driven? Thanks for any info I get.