So, I recently asked about a 6 in and I've been looking at a leveling as well. My question is what would the max tiresize be if I got a leveling, 3in front, 1.5in back? And does that sound about right for leveling? Or can you go bigger for bigger tires.

 

Don't go to a 3", you'll wreck the front end. Stick to 2.5" for leveling at the max, anything bigger and you'll need a full suspension lift.

As for tire size, what wheels do you have?

 

I agree. Do not put a 3 inch leveling kit on the front of your truck. It will leave your ball joints at too severe of an angle to last. As for tire size, you can easily fit a 33 inch tire unless you run a really wide wheel with shallow backspacing.