Welcome to the Z. A 6cyl throttle body will work on your jeep if it's a '96-'04 model.
If you want an even better upgrade, I sell 62mm throttle bodies and matching 62mm spacers. They're about 7mm larger than the 6cyl TB and have no taper, resulting in quicker throttle response.
6 cyl. throttle body is a good upgrade buy you have to use everything off of your 4 cyl. throttle body on the new one, (idle air control and throttle position sensor).
You still need to use the 2.5L IAC housing and sensor. It's the housing on the side of the TB held on with 4 small bolts, generally T20 tamper-proof torx bits.