Depressingly modest response to my call for recs in recent "Taco Trucks Of The Westside" post. Can't anybody here play this game?
That said, McQuaid's call on Ricos Tacos, the parking lot stand at Santa Monica and Westgate, was spot-on. Not only do they have tasty pastor, but the salsas are exemplary and they have excellent suadero, the rare-on-the-Westside rib meat.
Also, El Paladar Oaxaqueno (wonderful Oaxacan trailer) sometimes parks on Barry south of Santa Monica, so don't despair if it's missing from the main drag.
Low End Theory