OK, I need a little advice again.
I did manage to get the lifters back into their original positions.
Have finished putting the rockers back on and tightening everything up. Adjusted the gaps to .015, until I can run the motor up and check the final measurements when hot.
I found a couple of things strange about number 6 cylinders exhaust valve. This was the one that was previously locked open when I pulled it apart, and had one of the bent pushrods.
I couldn't get the spanner on over the nut, to loosen off the adjustment screw. Ring spanner was hitting the metal on the inside. Got a file in there to try to open it up more for the spanner, but didn't make much difference. Thought this was strange as all the others fitted fine. (It's only now that I'm starting to wonder if it's possible that the rocker arm has been bent upwards, caused by whatever bent the pushrod at the same time ?

)
It was also extremely loose. Had to screw it right in to take up the slack.
Manually turned the motor over a number of times by hand to ensure valves were all moving correctly. I am concerned about the amount of angle on the No'6 exhaust valve when in the fully open position, as you can see in the photo's. Don't want it coming out when running.
Any ideas or suggestions, or am I worrying about nothing.