Tight is right

When you install a high output alternator one of the most important things to keep an eye on is the belt tension.  Too loose and the belt overheats and too tight and you wear out the alternator and waterpump bearings. 

After a few years of using a wooden hammer handle to tension the alternator I decided to add a turnbuckle.  Becaues the turnbuckle is in a different place than the old adjustment arm I used heim joints(rod ends) which allow some degree of mis-alignment.  Mine came from http://www.bakerprecision.com/fk6.htm 

Belt changes and adjustments are now a "no tools required" item.