I did a 1" tt on my 02 st 4wd to fit 265/75 r16. Stock for me was 255/70. I have 4.10 and I felt a slow down in get up which, I think, gives me roughly the 3.73. But I'm happy enough w/ this setup
255/70 is about 30.1 depending on manufacture
265/75 is about 31.6 depending on ". The tires I got were spec at 31.9
I had rub on inner splash in the front (rear of tire) and rear tires. This is w/out cladding. Once I installed new shocks I now do not rub on the front tires (except the sway bar, which is a given). Shocks were stock 167k
235/70 is another factory size for the st but I though that came in 15 rims?
235/85 is about 30.7 depending on tire manufacture, so I would conclude you would at the very least need to perform a tt BUT your mileage may very
EDIT: Sorry 235/85 is 31.7 abouts