Hey barnbird do you have a 1100830 cause Wallace site is wrong about the alternators as are a few other sites it is Not a 63 amp but a 55a SI internally regulated.
Yes, I figured that out with a little more digging when I found mine was a 1100782 externally regulated with a closed face. Here is a link to the GM master parts catalog I used to verify what I had. http://www.teufert.net/partbook/67-76/2-i.pdf I should have looked here first but my memory sucks. Good luck with your search.
