Well, picked up the washers this morning.

Optimistically put them on and tightened everything up. pumped up the brakes and..... Still leaking on both sides. Not sure why this is still happening, but it's getting annoying.
Decided to give it a break and start on pulling the head off the motor. I will admit that I have never done it before, but was told it would be easy. It was certainly a lot easier that trying to get the brakes working. I have documented it in case anyone else needs some ideas. I had the manual but it often referred to bits with no pictures.

Well, this was the starting point. Bonnet was already off the car, but doesn't need to be removed. Have sprayed all the bolts and connections with RP7 the day before. I think that helped. Disconnected the bottom hose from the radiator and drained the water, didn't do the engine drain cock but should have. It's located under the manifold and looks the same as the drain cock under the radiator.
Took off the air filter and disconnected the choke cable, spring and throttle link, were it attaches to the carby.

Undid the two bolts under the flange were the exhaust pipe connects to the bottom of the manifold. These were rusted pretty bad, but came off a lot easier than I thought they would. Undid the fuel pipe at both the Carby and Fuel pump and covered the fuel pump end with a rag (to stop anything getting into it). Undid the Vacumn advance pipe from the carby and the Distributor. Undid the bolts attaching the manifold to the side of the head and with some wiggling, removed the manifold and carby as one piece.
Undid the top radiator hose and disconnected the Negative battery lead from the bolt on the themostat and the bolt on the other side and removed the themostat.
Put pegs on all the spark plug leads (numbered them) and removed distributor cap and leads. Undid the Two bolts at the top of the Rocker cover and removed the cover and gasket. Removed the screws attaching the side plate, however you can't get them all out without removing the distributor. I was concerned about positioning it correctly again, but it has to come out. Watched how it moved while moving in in and out. Withdrew the distributor, held it in one hand while I unscrewed the last screw. As soon as that was done I placed it back in again, and it appears to line up exactly were it was before. (let me know if I have missed something on this one.) At this stage I could see bits of metal and two bent valve push rods on 5 and 6 cylinders.
Next undid small oil pipe in the middle, that runs from the head to the middle section of the rocker arm. At this stage I grabed some cardboard and drew an outline of the top of the head.marking the location of bolts. Stabed a screwdriver through the bolt locations so that as a bolt comes out, I could place it were it can go back into the same location.
(Sorry seem to have lost that picture, will get another one)
Next undid the 12 bolts attaching the rocker arms to the head (two are just nuts that screw down onto the long threaded bolts that held the rocker cover. Removed the rocker arm/s comes in two parts with the oil connection in the middle. and the push rods come out and at the bottom are the "valve tappets ?", the small cylinders that the push rods sit into. Pictures of broken valve tappets and bent push rods later.

The 15 Head to block bolts should now be all accessible. 7 were under the tappet cover and 8 were always visible. They are tight, and I didn't want to damage them with a loose spanner. I found a 14mm ring spanner fits very snugly with light tapping with a hammer to get the spanner onto the bolt head. There is a sequence to tightening and loosing the head bolts. Work anti clockwise starting at the front left bolt that was under the tappet cover, then right front, right rear, left rear, and repeat. Needed to add a pipe to the end of the spanner to get enough leverage to release the bolts. The inside ones were easy once the seal was broken however some of the outside ones fought until the end ( and were very dirty/rusty coloured)
With all the bolts out the head was still holding fast. Placed a rag over a metal pipe and placing it in the outlets on the manifold side jiggled it enough to break the seal. Lifted the head off the block.

Could now see lots of things. Right and left side images.

Water in the 3rd cylinder back. White oil in the rear cylinder. Some corosion in the water pockets, mostly at the rear. Lots or crap on the top of the pistons.

Looking at the valves in the head. The brown marks I assume were exhaust, can see the brown gets lighter and disappears as you go from No1 to No6. Also No5 seems stuck open.

Here is the broken/bent bits I mentioned earlier.

Well that's enought for now. State of Origin in over, Qld lost this one.
Hopefully the block is OK and I can jyst get the head done, Will get unleaded done at the same time. Off to see what can be done with the head tomorrow. I may yet get it running, shame about stopping her. Would also be interested in getting a better manifold/carby setup, and extractors when it goes back in. Not sure what's needed.
Brakes are still a worry.