Starting a new thread here as I meandered a bit on the prior. I did de-install the original P90 booster attached to a chevy master. I was given a series 2 XJ master and servo from a driver that seemed to clean up well on the bench as I flushed new fluid through, but I found that the bolt pattern was different than the original, square rather than rectangular. Attached is a comparison.
Tony said that the Girling Supervac servo will work, but descriptions online are vague, and I don’t have a way to get my hands on one without buying one sight unseen. The bolt pattern looks square in the photos.
On further research, I find a reference to three series 1 XJ boosters with part number 11963 advertised as a replacement for the first two systems. these have a designation of a rectangular bolt pattern.
So, the question is whether that series 1 booster will work with the series 2 master that I have - I’m guessing yes. If not, then I am looking for a used series 1 master to rebuild.
Another idea that I am considering is simply to disassemble the series 2 servo and weld new mounting bolts on the rectangular pattern. I see that a question has been asked before about adapter plates (apparently not done), but changing the bolts seems simpler. Anyone try that?
Thanks in advance