Dick,
The 215's rub the inner trunk panel on full lock LH turn I believe....could be one car to another variances.... and I figured 225's would be more problems..... No need for them.
Since I was missing about 3/8" of the bottom of my bellhousing I had a tad more clearance than normal!!!! But 3-1/2 is pretty close...I thought I had under car pic's somewhere....couldn't locate them.....
The beach pic was taken in 2012, after my engine swap/ZF/frame rebuild plus associated bits and pieces....front shocks in there somewhere also. I believe that I went in for one more front suspension change, which involved raising the front end just a tad from what is seen in the pic's, and because of alignment issues associated (unbeknownst to me!!!) with the prior changes we needed a new set of shoes up front once again!!!
It's almost like if you take on a large passenger you're threatening your expensive alignment $$$s! Tire$!!! As Johnny Woods pointed out, the front end on these cars is pretty darned dynamic..... all you can hope for is "getting it close" and stocking up on front rubbers if you do a LOT of driving....which we did. Then DON'T TOUCH IT! 
On the other hand, the rear tires wore extremely light over the same time frame..... of course bad ball joints up front didn't do the car any good either.....
Was nice driving, comfortable car!!!!
Steve