I don't know about the "best" Wag, but here's a site you are going to love. Make sure you go to the home page to see this guy's restored 1968 Chevelle, a thing of beauty. Here is his link page with all of his sources for parts for his '68 Chevelle. I'm sure it will help!
http://www.my68chevelle.com/chevelle_parts.htm
Good luck!