I'm afraid finances are going to dictate that I just replace the brushes/regulator for now - just got a quote of $22 from a local alternator shop. He didn't ask which alternator i had - 70A or 80A - so I'm guessing its the same brushes/regulator for both. I will probably take the old part off and take it with me to his shop to make sure i'm getting what i need.

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'87 BMW 325 convertible (162k + miles)
'87 300E, 144k + miles (sold)
'93 Chevy Blazer (full size), 207K + miles
'89 Sea Ray 390EC, 2 x 454's, 1550 hours...
'85 AMF Sunfish

Olde Towne Portsmouth, VA