Yeah the online manual that I have talks about the "bleeding down " of the tappets. I noticed that while installing the rods and tightening down the nuts,if you turn over the engine manually with a socket on the crank pulley,suddenly the engine would "lock",and then after a few minutes it would free up. So that would make sense. But she will start at some stage.
I tried to start her again this morning and I turned over the engine with the stopper on, and turned her over for a few turns. I then gave her some heat and she started relatively quickly with the stopper off . Someone mentioned that if the exhaust is too long,it may affect the breathing of the engine?
Could the breather be a cause?