I live in Indiana also... I just spent an hour or more looking at the motor vehicle code.... the only thing I can find is the bumper position cannot vary more that 3 inches from the manufacturer installed position, and the headlights cannot be more than 54 inches above the ground.....
So you could lift it 10 feet off the ground, and as log as you make sure you have a bumper located in the "stock" position (think DOT Bar) and the headlights are not higher than 54 inches, you are golden..... I have seen trucks that are very high, that have a bumper and headlights mounted lower. I saw one that is a Louisville Chassis truck that has a bumper lower, and the headlights have been relocated into the bumper.....