Hahaha @MickW , I'll try not to find out myself in regards to the fouling. I actually sent the car back to a workshop to chase down the remaining issues. Jet roar was present 100% of the time with the second hand fan clutch, unfortunately I had to replace it again with the new OEM from Z1. I was lucky enough to find out about a guy through a family friend who has a passion for Z32's (owns 2), owns a race workshop and races in an Australian race series. He graciously agreed to work on mine and has had it since last week... So I only had about 6 days to foul the plugs before I gave the car up again! Some very cool gear in the workshop, a couple of prototype racers and a race build datto 1600 with a mid mount sr20det, lots of fab work! I am hoping to see it soon, especially since my box of OEM items should be arriving from Japan this week! Will update when I get it back.