Ah Funny you should mention that but all the cases are removable within the frame(took a bit of thinking about) even the Head and the clutch,The engine itself once its finished drops straight out the bottom easily, you just put it on blocks unbolt and you get a buddy to lift the whole chassis over the top you could probably do it solo but easier with a helping hand.
I know what you mean about the air box I reckon I am going to have to rework that as it sits to high but the calculations I have done work out to an 11 litre capacity to get the resonance tuning right so its a bit tricky, could possibly do it with a multitude of forward facing louvers and a much flatter box any ideas?