the fact that the webbers and exhaust manifold i fitted proves how much power is hiding it what can only be described as and otherwise amazing piece of jap engeneering
i think if we were to break it down into order of where the most power is hiding the main culprits clogging up the works are
1. inlet manifold
2. Exhaust
3. head/internal engine components
i think playing with the head before sorting out the inlet/outlet would be pretty worthless