I'm rebuilding a set of Magnum heads, and am looking to have them ported to flow a little better than stock (about 10-15% better is my goal). The MP Magnum Engines book lists a porting template, has anybody here used it - or if not, have they any specific recommendations to improve the stock production Magnum heads. Intake is the Professional Products Crosswind Airgap-style unit, exhaust is 20+ y/o Genie extractors.
Thanks,
Dean.
Thanks,
Dean.