Everything appears fine apart from the housing where the speedo drive sits, that is very broken!
Well today I decided to try and remove the diff, pot joints off, along with the covers on the diff, all the bolts are loosened off, but I can't get the pin out the gear change shaft!
I'll buy some proper punches tomorrow!
I thought I'd clean up the valves before putting them away

Before and after (a little more work to do on the after)

The exhaust valves seem to have come up a lot better than the inlet valves, in fact with the amount of pitting I'm considering new inlet valves anyway!
The engine strip seems to have given me a massive enthusiasm boost, it's all getting boxed up for storage for now!