Stock 14" Rally. What's my max width tire option?

I have 235/60/14's BFG TA'a on the rear with a 5.5 stock ralleye rim and 205/70/14 front. No problems with clearance whatsoever. I know that 245's would have also fit but 255's would be VERY close to the leaf spring(running stock V8 springs not SS or 340 springs)