I got 491 and 435 out of the mish mash of parts i put together but as you can see it falls off hard at 6400rpm which is from the bad porting on the used fast 90 i bought and installed. Its coming off and im putting on an msd atomic air force that will be ported by tony mamo. Along with a bunch of other stuff to make it rev happier like hollow stem valves, short travel lifters, an electric water pump etc, hopefully itll be up around darth v8r with 538/441