As Whitedog mentioned earlier in this thread, that's on Ford F250/350, Econolines and GM and Dodge trucks and vans still use the 8x6.5" (8x165.1mm) bolt pattern. As far as 16.5s go, they went the way of the dodo a long time ago, early '80s at the latest on GM, perhaps around '85 on the Fords. The 16s are far more common.
