I do not know if either of those masters will bolt up to your '97 Astro hydroboost. As I said earlier, I do not have much experience with the newer masters as what you are looking for. Some of the newer masters bolt up differently. If you want to go with a master cylinder as new as one of those, I would suggest purchasing the master and hydroboost as a unit. If your CPP proportioning valve is for a disc/disc system, then yes you should run that one.
Quote:
Originally Posted by exploderjim
Now I have found a 08 and a 2012 Master cylinder from a Silverado HD running 4 wheel disc brakes. would that work and two i would still need to run my CPP porportioning valve as well right? Here is my issue I just want to confirm that I'm understanding this correctly and that it will bolt to the master cylinder. The 2012 is a hydroboost set up as well. Anyways any help would be appreciated/
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