2000 TJ, need to swap Engine

[mitchw9]

I have a 2000 TJ 4.0 5 Speed. Pretty sure I have a rod on the way out. Wondering what is interchangeable? I'm told 2000-2004 TJ 4.0 and 2001-2004 Grand Cherokee 4.0. If I use one out of a Grand does anything need to be done ECU wise or should everything bolt right up and be good to go. Is it possible to use one out of a 97-99 TJ?
Any help would be appreciated, thanks.

['Roach]

Any 4.0 97 up will bolt up, but 97-99 will require you to make brackets for the coil pack. Swap whatever cam sensor you have over, and use your intake and exhaust manifold, all will work together with your existing computer.