Front tire height

Hi guys, I currently like the way my duster is setup stance wise front and back, but I will be going to 18s now and I want to go to a bigger front tire, height wise. I want to go from this 24.5in (205/60/15 tire to a 26-27 in front. What do you guys think? Can I fit a 27 or 28in tire? The main issue right now is that with the current look, the TTI headers are 1-2 inches from the floor, I was hoping that taller tire would help with clearance before I had to raise the torsion bars. Thanks!