Need help with fitment please!!

Need some info and decide to hit up the experts...you guys and gals!

I am currently running 265/70/17 Goodyear Duratracs that are getting pretty worn (they vary 30.75 - 31.50" tall) that I bought used for $100. I found a great deal on a pair of 275/70/17 Cooper Discoverer AT3 tires ($300 with less than 100 miles) but am unsure if they will fit my stock 2003 Tacoma 4wd Crew Cab. I want to go with more of a road tire because 95% of my driving is on the road and previously had the AT3's. I replaced the factory 16" wheels with 17" 2005 Tundra Limited wheels because I love the look of those wheels. If need be I could crank the torsion bars a tad and add a leaf but I would prefer them to fit with out tweaking anything or adding spacers. I have a feeling that spacers will not be necessary because the Duratracs seem to be as wide as the bigger Coopers and the Good Years have about 3/4" of room between the tire and upper control arm. Measuring, it seems like I would have clearance between the tire and front valance and tire and rear part of the inner fender well but thought you folks could offer some insight as well.

Thanks!
Wiscy Toy