This twin line brake PDWA valve is fitted on the front bulkhead of the engine bay from 1978 on as opposed to the single line valve which was fitted on the rear subframe.
Fixing bolt is 2.25" long UNF 1/4. The 4 Brake unions are all metric. Mounting hole at the top, end nut towards the centre of car is for rear system.
The valve was repositioned closer to bulk head when servo fitted 1988.
5 port type of this on Australian cars is available to special order.