Taco Trucks in Jax?
Word is that there's one out on 103rd street on the Westside, but I haven't gotten out there to find it.
I recommend Pepe's Hacienda on Old St. Augustine Rd. - you have a tienda + lunchcounter arrangement w/ an on-site panaderia and tortelleria. Menudo available on Saturdays - the place fills up for this.
Amazing cheap, amazingly good...
3615 Dupont Ave # 900, Jacksonville, FL