Bill, when you say "vendors" are you referring to a Chevy truck parts vendor, or everybody- How about this harness from Haywire- which has been mentioned in the above discussion
http://haywireinc.com/catalog/shopping_cart.php?sort=3a&osCsid=0d72ivo03dd748fcvhfdbntsf1
like Haywire, Ron Francis has simply what he calls a "retro" Chevy Harness
http://www.ronfrancis.com/prodinfo.asp?number=WR%2D85
But I'm wondering if these harnesses are going to require a lot of cutting/splicing-
plus, they're not mentioning alternator vs. generator, column or dash ignition, etc.
Thanks for all the help on this-

http://photobucket.com/1957BagdadChevy