Installing a CB radio in my Wrangler LJ. Process would be basically the same for a TJ. Decided to go with the Cobra 75 All Road.

Parts:
Cobra 75 CB - https://amzn.to/3RGvkpa
Antenna - https://amzn.to/3ZCorHb
Coax cable - https://amzn.to/48LI8AL
Mount - https://amzn.to/469ITBO
SWR meter - https://amzn.to/48BjyCy
Jumper (for connecting meter to tune) - https://amzn.to/48uAf2d

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