http://www.svt.ford.com/flash/index.html
Go to that link and click on SVT archive at the top. Select one or all of the 93-94-95 Ls and then click View Specs. Scroll down to the bottom of the page and you'll see the wheel and tire size that came stock on the GEN 1 L. It's a 17x8 5 spoke cast aluminum with 275/60R17 Firestone Firehawk GTA's. Some guys run a 285/55R17 I believe it is. Then some of the more lowered Ls, they are lowered 1 inch already from the factory, run some sizes like 275/50R17, 275/45R17, and 275/40R17.