Ok... one more item... I guess I should have fully thought through all of this and put it into one post
..
There is a place called Perogie Enterprises...
www.perogie.com that deals in Ford performance parts. I've never dealt with them but if you scroll down to Performance and Specialty and click on the 428 CJ & SCJ you can scroll thru that and they offer the Ford Shaker Vacuum Diaphram New Repro & also a rebuilding service, I would imagine this could be the same peice as our vaccum piece.