The taco stands that appear in the late afternoon and evening across Juárez are an institution. The style here is northern: flour tortillas rather than corn, filled with carne asada, al pastor cooked on a vertical spit, or tripas (tripe) for the adventurous. The street stands near the Pronaf zone and along the older commercial streets of downtown set up after 6pm and run until midnight.
This is not a specific venue but a pattern of eating worth seeking out. Look for the stands with the most local customers, order one taco at a time until you find what you like, and eat standing at the counter. The salsa verde is typically the hotter of the two options. Beers from a nearby tienda complete the picture.