it is definately not worth this swap, its the same amount of work to do a V8 swap. The you will need the engine, tranny, Transfer case, wiring harness, and computer to make it all work. then you have to make/fabricate/cut off doner jeep - the motor mounts and weld in, you might as well just buy a 6 cyl. to begin with. and for future reference, no the transmission will not bolt up, the xfer case has different spline count, and motor mounts are differnt.
Sold) 94 YJ, 4.0L 5 sp manual, Hard top, 33/12.50s, 4.10 ring&pinions, Polished D30 w/Aussie front, 8.8 rear w/ LS, 2.5" RC, 2" BL, 5/8" booms, TJ flares, SYE, custom F/R bumpers and rock sliders, 8k winch, dual optimas, HO alt.
2) (Sold) 99 TJ, mustang 5.0 GT 40, AX15/231J, trektop, 37x12.50r17 cooper STT, superlift 6" long arm, D30/44 w/ ARBs & yukons, customized warn bumpers, custom sliders, 12K winch w/ synthetic rope, custom paint
3) 2007 JKU being built now