Bit more on the engine today and yesterday. Took the head off yesterday to a check inside and found marks on the pistons where the inlet valves have hit them and some scoring on the bore of number 4, looking over the head I cant see any marks on the valves that match those on the pistons and after chatting with others about it it's felt thats its snapped a timing belt at some point, valves have hit and bent etc and that they've put on this head instead, which would explain why its black and the rest is in the army recon light blue paintwork. So decided to chance it and put the head back one with new gaskets etc (and as said elsewhere on the forum prob wont get change to work on it again for 2 weeks)
Finished it off today with fitting the manifolds, with an 2 1/4 inlet one with the valve removed and the exhaust one with a splash of hear resistant black paint
Then went onto fitting the new timing belt, bit dirty inside but didn't seem too old so put it to one side with the tensioner incase anyone ever needs ones sharpish
Cleaned up and new belt and tensioner on
There wasn't anything about a gauze filter/breather at the bottom of the timing case in the Haynes Book of Lies when taking the timing cover off so that came as a bit of a surprise, cleaned up and refitted, but was wondering if thats a military fitting as the timing case gasket needed cutting off at the bottom to fit the filter back into place with its own gasket too