[Chevelle-list] almost off topic

[Jim & Chris]

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