Hey @Captainfab , I need to replace a bad power booster in my 67 Suburban. I was looking at a 9"dual diaphragm from 1987 Gbody (and your bracket)
The booster looks like the one in you 1966 pictured in you web ad.
https://www.rockauto.com/en/moreinfo...t=1884&jsn=640
Do you think it will work?