Old master/booster finally died. Installed a 1998 ZJ dual diaphragm unit. Install was straight forward. Reused the ZJ booster, master and distribution block.
Everyone always talks about the 95/96xjs.... But NEVER have I found anything about a ZJ, which i find are far more plentiful.
Unit was a direct bolt in, even came with the aluminum spacer like the 95/96. And was able to keep washer fluid in factory location.
Unit has Two lines coming off of it. With built in flexhose. So bending/making new lines is easier. Cut off original oddball ends and flared two standard 3/16 flares into existing line. Installed one T block for the front lines and connected rear line direct.
Shaft fit perfectly onto my factory 91 pedal. Only real modification necessary was making a 1/4" or so standoff on the pedal arm to reach the factory brake switch. In which I just tightened a hose clamp around the pedal arm that then presses the switch when it's at rest.