Hello chap.. Assuming the bailey tank fits in the same way as ours.....
The tank is bolted to the fuel pump blanking plate on the r/h/s rear of the cylinder head.
The short ¾ hose connects directly to the breather outlet adjacent.
The original hose from this outlet is cut and is fixed to the ¾ dia pipe on the lower side of the tank. This is the oil drain back into the block
The 5/8 pipe on the upper side of the tank connects to the breather outlet on the opposite side of the rocker cover. The black plastic capsule is removed and the small bore hose that connects to the manifold must be blocked (if you do not do this the car will not idle properly).
The 5/8 pipe on the lower side of the tank connects to the 5/8 hose that was connected to the plastic capsule-this feeds to the air metering unit.
Please make sure that all pipe joints are secure as an air leak will cause idle/running problems.

wayne
www.proalloy.co.uk