Why not '75? Granted, the '75 wheels should be a bit wider, but that just makes for more desirable tire choices.

And on a related side note, I have had a set of 14" 240 steel wheels with 185/75-14 snow tires fitted. This past week I put those on my 164, and I am very happy with them. The handling on dry roads is a good bit more responsive even though the sidewalls are as tall or taller than the old meats. I was a bit concerned about clearance when chains were in place, but there is actually less rubbing there than there was with the stock tires.

They are also offset just a bit more to the outside I think, which makes 'em fill out the fenders a little nicer. Of course, this makes it wander a tiny bit on uneven roads...but not too bad.

-Matt