Sammy,
There used to be a mini-chain of restaurants there in Tustin/Orange, CA, called
El Taco (Not "Del Taco). They used to make THE BEST taquitos and guacamole. Do you know if they're still around.
I used to hit up the one on Tustin Ave, right by the 22 Freeway. The picture posted by TerryH brings back such vivid memories, I'm drooling all over my desk!!!
Randy