My personal opinion (ok, my dream):
12 Valve(the 24v head doesn't gain that much) with a "Custom" P-pump. A good Calibrated pump with a Fast delivery cam, larger barrels and plungers, a set of "SKT Smokin DV'S, a 4k Gov. Spring, and SKT Injectors. Man, If my dreams are correct, that thing is one bad mo-fo!