cobyoshi

My brake master cylinder system has failed so i when hunting on ebay received it today does not fit even though the notice said it would.I tried it on a sierra and it fits. So i am wondering is it a transit breaking system in the p100 1.8 td as if so what year my p100 is 91. I am going to try source a transit one locally if it is the same braking set up. Can any shed any light on this?