I'm not an expert, but I have heard that at higher rpm levels, and a properly put together combination, you can actually acheive better than 100% efficiency with the "air pump". But, with the spec heads, I'm not sure this will be possible. This combo is definately suited for higher rpms, and with a 363 I would be looking to get as much top end as possible. Of course, those heads will be restrictive.
Davebat, again your motor combo sounds just like mine. I ran mine at 7,800 rpm all day, and what a rocket!