[megafreakindeth]

getting ignition and twin turbo i figured would help you pass because of the complete feul burn. If you really dont mind there are catallitic converters that will scrub exaust for a short period of time, mainly, the time it takes to pass an emmissions exam but these are somewhat sketchy to find.
of course doing that would be illegal... then again so is trying to pass an emmissions test with a 460 in your car.