More like an SF on offense and defensively, he's a PF by default, because he lacks the size and/or strength to guard C's and the quickness to guard SF's. He's not 7'0'' (I've never understood why people do this with basketball players, just round up from 6'10'' to 7'0'' like it's nothing. You don't ever hear people say if someone is 5'10'' "he's a 6'0'' footer").
Barefoot Bonner is 6'8'' 1/2, so I'll give him somewhere in the 6'9'' range (could be a quarter, a half, who knows exactly) in shoes, but more important than his not so overwhelming vertical listing for a PF is his lack of length. For example, Ratliff is probably less than an inch taller than Bonner barefoot, but he's clearly got a much longer wingspan, so it gives the impression or feels like he's actually closer to 7'0''. That and the fact that he plays like a traditional big man, at least defensively.