28" Tire to rocker clearance - Duster

mopowers said
I run 275/60/15 Cooper Cobras on my 68 dart sedan and have about 5/8" clearance to the rocker. I can't imagine radial tires grow too much. You'll probably be fine with 3/8".
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Maybe you're right. I want to do my homework to avoid laying out cash and then having an "Ah, crap!" moment that requires more cash to fix.