[ponjohn]

74 Ventura
Bone stock, 350 Pontiac 2bbl with AC.

OK...

• The atlernator light was on, naturally replaced the alternator. not charging
• Found the fuse blown for the "gauges"
• Replaced the fuse let it idle no issues.
• Took it for a ride a week later, no issues until...
• I accerlated like taking off from a light, alternator light comes back on, fuse blow.
• Today, I changed the fuse, verified it was charging 13.7v with DVM on Battery
• I gently went for a ride, probably not over 15 mph, no issue.
• Stop the car, hit the gas pedal as agressively taking off - bingo.
• Fuse blows.
• Measure voltage at battery 13.7 - appears to still be charging with the alternator light illuminated.
• Bring it back. change fuse, alternator light on.
• Let it sit for a 5 minutues, start it up alternator light off.

My theory:
1. Igition coil breaking down ( car sat for 10 years) and causing excessive current.
2. Movement of engine under hard load causing ground issues?

I am open to ideas or a better undertanding of the function of the alternator light. [ my understanding is, the guage fuse supplies voltage to "idiot" light which in turn provides excitement voltage for the alternator]

Thanks.