Hi Mark, It's nice to have a thread for us "Down Under" Go Techer's.
My two 5 ports are running sweet as !! That turbo head button and LRP #6 Turbo plugs I got from you work a treat too. The difference with the turbo head fitted was really noticable. More power and a much sharper throttle response throughout the range (plus this engine is barely run in, so more power to come in the future I'm thinking

).
Also I would like to endorse the MM treated clutch bearings. These are the longest lasting clutch bearings I have used, very impressed. Cheers, grizz1