You have a few options. I converted the front fender (which already had a dealer installed retractable antenna) to fully disappearing antenna. Gary Hall used to sell a windshield that had embedded antenna, and Larry Stock sells a plastic bracket that bolts on to the right side decklid hinge mount. Either a CB or regular antenna with a quick-disconnect, will fit. There's a device that fits into the antenna cable that prioritizes transmissions so if you're listening to tunes,a CB transmission will over-ride it.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.