Well, I can report that my 16v 5spd LOVES the 235's.

It is a little slower getting up to highway speed, but will easily hold 70 mph even up hill or with a headwind. My old Jeep 4 cylinder on 31's would not hold 70 unless the ground was flat and no headwind.
I haven't had them out playing yet.

You all will be the first to know when I do!
Cwkick