Why do you need to know amperage to get a voltage regulator?

Other than that, your '58 didn't come with an alternator. So it's anybody's guess what alternator is on there. Since it has an external regulator and it's in a GMC we can assume someone put a '60s type Delco in it. But they may have put a Ford or Dodge alternator in there. Got any pics?

Last edited by cletis; 09/08/2009 12:32 AM. Reason: can't spell Dodge.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.