Right, I've looked at google images and my old strip down pictures. Looks like the long exhaust manifold pipe does go on the bulkhead side. I can't see how the mid section can move anyway. So, I'll have to try and mould the new pipe in to a shape that fits. @jamesmartin have you come across this problem before? I'm hung up on the fact that it seems to have occured since I rebuilt the engine.