Let me clarify.The question is how far the axle can be forward before the tires too close to the front lip of the wheelhouse.Space needed between tread area and front lip of wheelhouse.
As long as you are measuring at the centerline of the tire, in other words where the tire comes closest to the body, that would be fine. Radials don't grow like slicks. I run 275/60-15's on my cuda, and I have similar clearance.