The boosters are the same, no physical or mechanical differences.  A low brake 
pedal is not a booster problem.  There are other issues involved here.  I would 
be checking for bad wheel cylinders, bad hoses, or blown out brake lines.  The 
vacuum is produced by the engine, not the booster.  All the booster does is 
hold the vacuum for the power assist.

Tom Rightler
MCC Newsletter Editor
  ----- Original Message ----- 
  From: Jim & Chris 
  To: [email protected] 
  Sent: Saturday, May 23, 2009 12:08 AM
  Subject: [Chevelle-list] almost off topic


  slight bit off , but it is A- body related :O) I just picked up a 1968 
cutlass and it seems to have an intermitant brake peddle one minute firm next 
it goes right to the floor .Does anyone know if a vacuum power boster from a 
1972 chevelle that was in good working order when I took it off my chevelle 
will work/fit a 1968 cutlass ? besides possible fitment problems is there any 
difference in the vacum produced between them?both are drum brake cars. Jimmy.C

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