Biggest tires for mini tubbed Duster

I've got M/T's 11.50 x 29.5's on my Duster with a stock width 8 3/4. I have Wilwood discs in the back which actually moved the tire out about 1/2" which makes it slightly off center. I've pushed the wheel openings out and rolled the lip. I modified the front and rear openings slightly with the front of the opening as far as I could go without cutting the rocker. I used a 10" wheel with a 6 1/2" backspace. This gives enough room to where they don't rub and don't protrude from the fenderwell so there is tire tucked up under the fenderwell. My next move is going to be to put a wheel tub in it so I can get a taller tire under it. A taller tire acts like a wider tire on launch as it squishes down. This way I can use a 33 x 10.5 tire which will give me plenty of launch traction. I'll use a rear wing (think pro stock style adjustable) to add down force down track and keep the car going straight. This way I won't have to cut it up for a back half and it will take some gear out of the car so I can add some cubes via a stroker crank. 10.0's here I come.