My 360 now has over 500 hrs on it using a Hitachi 35 amp alternator (from
the 1970's)  with a Deltaelectronics (VR600A) regulator with over voltage
protection.  My problem is that the alternator doesn't last.  I'm now having
problems with no. 5.  I thought it was heat and a 5/8 " diameter blast tube
was installed outletting cooling air on the body of the alternator.  Hasn't
helped.  Is there another automotive alternator out there using an external
regulator with a better performance history that will fit on the Lycoming
360 A engine?

Byron Eskesen
Tucson, AZ