I do know that the original master had a 1-1/4" bore x 1-1/2" min. stroke. Seems to be a fairly high volume set-up, but then, the rear brakes one these 1.5's are ginormous. I'm wondering if there is a formula by which the total volume of fluid that needs to be moved can be determined. I'm just guessing, but I imagine that disk brakes don't require as much fluid movement. That would indicate that something close to the stock bore & stroke should be adequate.
Also, the original had Hydroboost which I will likely replace with modern parts as well. The new Cummins engine does have a power steering pump that I have been told is more than adequate to handle both steering & brakes. I'm shopping around for a complete master with boost that can be frame mounted but haven't settled on any particular setup yet. Here too, I am open to any experience/wisdom the group has to offer.
Last edited by Tango; 11/19/2013 10:52 PM.
