Someone here posted to one of my earlier posts a diagram showing the mounting of the front shakers (a hand line drawn diagram, not the full front end exploded view). I believe it was John (Hammered).
I printed it out at that time and filed it, GONE! Can't seem to locate the post now either.
Ramair John had some of those brackets for '68s made a few years back. I bought them from him and they were very nice. I don't know if he still has any of them. The originals had really rotted away on mine.
Looks like someone cut mine away as the bolt is frozen. I think I can do a pretty good job with some flat stock I have and the drill press. Do you have his contact info just in case...