I have had some problems with my AFR getting really rich after 5000 rpms. I bought a Crane HI-6 CD ignition and coil, and a MSD pro-billet dist. I run autolite 24's gapped to .035 I make about 12lbs of boost at 5500 rpms but my peak power is at 10lbs of boost at 5000 rpms. After 5000 rpms the AFR go way rich past 10.0 at 5500 just killing power. Should I be apping my plugs at say .025 Any advice would be great.