Uhaul sells hitches made for s13's. I worked at the one on hillsborough next to hooters for about a year and a half in highschool and I think I did 2 hitch installs on s13s. IIRC I had to drill all 4 holes. Just call them and ask for a quote. And do the wiring youself its easy as hell, but it cost about $40. Just called my friend that still works there, the hitch cost $150+tax.