There appear to be a few types of brackets, bolts and styles. The parts blow-up shows a threaded rod w/ welded nut (#203) or the 90-degree (#206). There are also at least 3 and maybe 4 styles of brackets with/without welded nuts.

http://www.peachparts.com/shopforum/attachments/diesel-discussion/85147d1285590241-getting-alternator-off-alt-exploded-view-other-bracket.jpg

Some pics of the "eyebolt" fix are here: Alternator adjustment bolt fix

The pics show a wood screw thread (I think for illustration only) but use a machine screw thread. This fix seems to be an expedient substitute for the #203 style tensioner - assuming the bolt that goes through the bracket is long enough. Maybe needs an extra quarter-inch?