?? regarding 328 steering wheel....

I am working on a deal for a 328 and should have something done by the end of the week or early next week. (87 red/tan gts)
I wanted to get a jump on things and order a couple extras so they are ready to go when the car arrives. (suede steering wheel, aluminum pedals/shift knob, shields...) So, here is my question.... What size is the stock steering wheel on a 328? I want to buy the suede Momo I have seen other folks here with, but don't know whether I should get the 330mm or 350mm. Which one is equivalent to stock? Any opinions one way or another?

Thanks

 

I put a 350 mm on my 308. Works fine, and I believe that is the stock dimension.