A 275 is 10.8 inches wide, so youre jus gonna gain .3 of an inch goin with a 275 as opposed to a 10.5.
Now goin to a 315 would be a jump, its about 12.4 inches wide.
BUT, a 10.5, hell, even an 8.5 inch ET Street will hook plenty. Ive seen a Mustang rip the chassis launching on a 26x10.5...