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Username Post: 9 in brake booster        (Topic#364833)
rick1965 
Contributor
Posts: 115

Loc: joliet ill
Reg: 12-07-16
04-05-21 05:50 PM - Post#2817540    

so purchased a new delco style 9 in. power brake booster for my 65 ss , old one was tired and leaking , so the problem im having is mounting the new one to the firewall , the mount bolts are 3 1/2 center to center on the top and 3 3/4 center to center on the bottom , the new booster is 3 1/2 top and bottom center to center and will not go through the firewall , is this how they are made now? anyone experience this? i emailed classics tech support and will see what they say , wrong part maybe? sure dont want to drill out the firewall ugh....



 


chopr1 
"3rd Year" Gold Supporting Member
Posts: 67
chopr1
Age: 73
Reg: 01-11-19
04-05-21 09:52 PM - Post#2817556    
    In response to rick1965

Bottom holes simply elongate hole to allow the bottom bolts to go in. Doesn't take much on each side. I used a air Dremel, some say to file but the metal is hard. I got my 9" from another source but have the same dimensions as yours.



 


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