I love the precise timing of a fixed idler gear drive,,plus if you ever use a solid or hyd. roller,,you don't have to mess with a thrust button. If you can get it fairly cheap,,,I would! Love the noise they make too!! Just make sure the water pump clears OK,,Ive never used 1,,,might ask a few of your mates over there or call Milodon,,,yeah Ade,, I spent about that time on mine,,10K,,,,took a fair amount of time to save the "Chatter" for that engine!!