350 with AX15 (you have the AX5 in your 4-banger) with a 23-spline NP231.. a 3-core radiator and AdvanceAdapter's 350 engine bolt-on motor-mounts.
Later on, flip in a Ford 8.8" rear end with disk-brakes from an Explorer (and I just heard that some Ranger's also use the same axle) - match the Ford's gear to your front axles 4.10 ratio (Explorers with the tiny engine have 4.10's) and call it done.
Price would be time, radiator, adapter for tranny - swap tranny and t-case for the one you want (maybe some cash would need to change hands), the motor mounts and some wires and hoses.
Hello, my name is Vance and I am a Jeepaholic.
Its better to be naked with your friends, than to be clothed with your enemies
Silver 2006 TJ Unlimited
, zombie ready as the daily-driver