Is it possible to rebuild a brake booster ? Do they

inertia said

If you get to taking it apart,, BE CAREFUL!!!

If memory serves me, there's a loaded spring in there, that'll throw you back, if you're not prepared.. If it's a "twist apart", I put one part in the vise, and drilled holes in a piece of plywood for the mounting holes and centre, then twisted the plywood to disengage the halves..

Definately get a manual, or perhaps some-one can post a link..

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Bingo , that's what fiend said , hard to build without the tool . He put out lots of calls ,no luck . have a used one that ""might "" fit , will see tomorrow , what a great bunch of guys at this garage none in quebec one used in Ontario they really searched , this thing is as rare as hens teeth .
Will have to go the boosterdewey or Stewarts in Ontario route when I pull the old one off . What a pain !
One more question did the booster change in 72 up with the single piston caliper ?