Got the spare engine back and it was full of water ! was tucked up in a dry outbuilding, guess it cant have been that dry, so its not going in as is as was locked solid, good news is that I salvaged the head, a piston and conrod.

The head was wet and a bit crusty but the valves still open and the seats look intact, think the carbon and oil has protected them, the piston was stuck into the bore but came out and it looks ok, a new set of rings and I may be ok.

I got the old motor apart tonight and the broken piston and a very bent conrod attached, am hoping the crank is ok and the conrod and piston took all the damage, the big end bearings still looked new so the previous owner obviously did rebuild it.

So, going to mock it up, get it all inspected and make a list of parts,

New valves
Head Gasket
Exhaust Gasket
Sump Gasket
Oil
Oil Filter
Plugs
Piston Rings
Big End Bearings