Helped my kid with his Jeep(s). Yes, he's an addict. A couple of pointers depending on what you wish to operate.
Put in 8awg from the battery to the cab, protected with high temp loom. Fuse accordingly at the battery. At the radio end, install a relay to turn on/off B+ using the Accessory connection. This keeps from running down a battery when you forget to turn off the radio.
Secure radios good. His friend had uses 6-32 aluminum screws to hold in his radio, and it broke loose while on Drummond Island on the dirt roads. BTW some of the guys use CB channel 4 (AM) is considered the heads up channel for Jeeps around here.
On his new Jeep we didn't have a problem with noise, but on the Willys we had S6 of noise which would ruin comms, and the VSWR would bounce around. Solution was the braid from RG-8. with 5/16" lugs at each end, grounding the tub, axles, etc to the frame. Don't depend on metal to metal contact as corrosion, paint, and powder coating are restive, if not an insulator. Once bonded, problem solved.
If on low bands, get a large antenna with ball and spring. The small 23" - 40" fiberglass whips are very inefficient. With the Hustler and 80 meter resonator I was able to work him from 40 miles away. Side note, tell riders in the back of the Willys not to grab the whip while in the back seat and the operator is transmitting.
I don't have a Jeep but run low band in my truck, and sometimes highband/2-meters. Same issue with GMC, bonding sections of the truck, including engine, to the frame lowers the noise.