Vectra wont start after rebuild?

Hi there!! I have just installed a cylinder head as the previous head got destroyed when the cambelt snapped. I have connected all sensors and I have even replaced cam shaft sensor. The car spins over and it sounds like it is trying to fire but no joy! the only thing i can think of is that I have maybe got the leads the wrong way round on the coil. Where is number 1 on the coil (not the engine)and where do you go from there?