Another option is the one I used on my 216. Get one of those chrome alt brackets shaped like a letter F that they sell for attaching to the bracket on SBC V8 headers. The front hole in this bracket aligns the pulleys correctly but the bolt spacing is not the same as the mounting bosses on the engine block. Redrill the rear hole so it aligns with the hole in the block. The upper adjusting arm needs a slight amount of rebending to align with the adjustment boss on the alternator and its done.
Not that you really need a chrome bracket but they are available almost everywhere for under $9 which makes it simple if you don't have a late model inline one laying around and you don't want to roam a junk yard in the middle of winter to find one.
Mike
