So, after much debate, I'm going to source a 4.0 and manual trans to swap into my 03 tj with a blown up 2.4. I've gone round and round over the whole v8 swap and I just want a dependable OEM solution to my problem. I know MOST of what I need, but my question lies with the wiring. Which years ECMs will swap into the 03s? I know they use a different "language" than the 97-02? but are they year specific? Will I need to change any of the wiring in the dash or should it be a plug and play set up? Provided the engine is correct for 03, a compatible ECM is found, and the dash harness is compatible, this swap should be straight forward. I know I need new frame mounts, 23spline shaft for tcase, a ax15 or nv3550, and I ok with that, but the wiring and ECM thing boggles the mind... Thanks in advance.