Get off the 163 at the Balboa exit... which lets you out at Kearny Villa road or Mercury (depends on the direction of travel on the 163) , head East on Balboa one stop light East of Kearney Villa Rd. Turn Left (No other choice) into a long road through the parkign lot, the car show will be at the far end of the parking lots.
Lat year there were Cobra's, Corvettes, 9 sec Nova, Camaro's... 50's Ford trucks... a popcorn maker, dunk tank, live band, San Diego Blood Bank mobile donation bus, etc etc.