Vac brakes- Steve L Dove Buick buick book

[psycho6cyl]

Hopefully somebody can help me out. I lost one of my Dove books-believe its the one w the gnx on cover all black. In there he talks about the vac brake upgrade but w a better master cyl etc. I used it on my last gn.worked great looking to.repeat it w this gn. If anyone can skim through it or knowthe reciepe please let me know. Thx

 

[John Larkin]

The master cylinder I used was a new cast iron replacement for a 1987 Pontiac Grand Prix with a 307. The take up valve has to work properly or you will always have a soft pedal or won't be able to hold boost. That's why I emphasized new. Good luck.

 

[psycho6cyl]

Thx. From memory I think I.ordered a 85 caprice mc w resvior but not sure. Idk if it was a bigger one etc..