Legal lift depends on the state. Minnesota was, if i remember right, Maximum 28 inches to the middle of the bumper. Texas has no laws on that at this time but there are nasty rumors that they will impliment one soon.
Goto your DPS either on the web or call in person to get the answer. There is no federal laws on the books so the states regulate that.
Hey, nothing wrong with stock. Anyway, just hang out in the forum and you'll probaby get some ideas. If you need any help, jsut ask. We have some real experts in here (not me) that are always glad to help out.