Tacos de Caveza roams around the North and Northwest side. For the longest time, their outpost was on Irving Park Road from like Western to California, usually around Rockwell. Then I saw them off of Elston, broadly, approximately in between Belmont and Pulaski. Now they're in Logan Square it seems. Usually saw them going to work in the morning.
Never did stop and get one - always wondered. I presume this is only one truck. I'll have to stop now that I know it is legitimate.
"People are too busy in these times to care about good food. We used to spend months working over a bonne-femme sauce, trying to determine just the right proportions of paprika and fresh forest mushrooms to use." -Karoly Gundel, Blue Trout and Black Truffles: The Peregrinations of an Epicure, Joseph Wechsberg, 1954.