You guys have summoned up a wave of nostalgia for me. I grew up (from age 6 or 7) eating chicken tacos at La Cumbre in SF (not pollo asado, but the stewed chicken), and throughout my childhood, tacos and La Cumbre were synonymous. You just couldn't find authentic tacos much in Oakland back in the 70s. Back then, the family friend I often went with was one of very few gringos ordering lengua and hog stomach (as their menu calls it) tacos. Hell, he still might be.