Specifically shaped brake pipe kit with metric unions is required when changing the master cylinder from early front to rear brakes that had 2 UNF unions. This has the metric type unions for fitting the only master cylinder now available
GMC227 which has a yellow identification tag and 12mm lower union fitting. For L/H/D pipes see
BAU5655MS.
Note: When fitting to a pre 85 car with stepped bore master cylinder you will need to cut the plug connector from the pressure failure switch and twist the wires together, these can then be connected to one side of the float switch cap, the other cap connection must be earthed at a suitable point.