Since CB lore has largely faded into the distant past, I'll remind anyone running a vehicle with a fiberglass body (e.g. Speedycop's Reliant Regal) or anyone else who is otherwise planning to mount their antenna somewhere not on a large metallic surface that you'll need a "no ground plane" antenna. They're still readily available for use on fiberglass boats, for mounts attached to West Coast mirrors, and so forth.
1982 MG Metro 1300: IOE 2015 Pacific Northworst GP, Longest Distance 2010 Cd'L Box Wine Country Classic
1980 KV Mini 1: Worst of Show and Fright Pig Supremo 2009 Concours d'LeMons
1978 H Special: Second-Round Elimination 2010 LeMons Pinewood Derby at Sears Pointless
1967 SAAB 96: IOE 2012 Pacific Northworst GP