Thanks. To be honest, I didn't disassemble the engine for a couple of reasons. Firstly, because of the extreme dificulty of obtaining replacement parts, and secondly, because the engine turned over nicely with a quite large amount of compression.
I have purchased a parts/ workshop manual for this particular engine from the US, printed in 1968, and I am waiting for delivery. Once it arrives, I can then provide more details.
Cheers.
Thanks for all the compliments everyone.
Can't wait to restore the second one and have a pair now!!