Anybody have one new/used they can't use?

For a Ford 302. I want to be able to dispose of the stock tensioner set up. I need the kind that allows one to apply tension on the belt, by adjusting the alternator. (Alternator mounted on right side of engine)

This style..http://cgi.ebay.ca/FORD-ALTERNATOR-B...1%7C240%3A1318