Let's see: haven't thought of their names in many years, even though I haunted some of the Valley dealerships, so this is rusty...
Lou Baney had a Chrysler-Plymouth dealership, and I recall a dealer called Mashak, both in L.A. - both were sponsoring drag cars & Baney backed a AA/FD effort.
In the West Valley there was Reseda Dodge, a Chrysler-Plymouth dealer across the street - where Dad bought his '66 Sport Fury - and a similar setup in Van Nuys with a Dodge and a C-P dealership- Van Nuys C-P is the name I remember.
Dependable Dodge in Canoga Park, with yet another C-P dealer across the street.
San Fernando had a Dodge dealer, and maybe another C-P across SFV Blvd from them.
Orange County had Saddleback Dodge; they sponsored drag cars, most notably Charlie Allen's cars, but that's all I recall from OC.
There were other Mopar dealerships in Burbank at one time, too: I recall Bob Smith C-P, where Dad bought our new '57 Sport Suburban.