Update:
Alternator bench tested at 14v+.
Different/new battery hooked up, same charge of 12.5v coming from the alternator.
Tested electrical system for parasitic drain - no draw above 50 milliamp
Grounds ohms checks - alternator, engine, transmission, frame, body panels all within acceptable range
Positive ohms checks - alternator, starter all within acceptable range
Still getting a reading of 12.5-6v with no load, 11.34v under load. When van is turned off with no load, the battery reads 10.8v.
Any suggestions?
Fortunately I can still start and drive the car, the battery doesn't die, but eventually Ill be churning through batteries and don't want to be doing that. Not to mention, short drives with high loads will leave me with a dead battery. Love to hear some advice.