On an un-related note those engines are impressive. Came out in the Holden Rodeo, a 3.5 litre petrol quad cam alloy V6. 260? HP from memory. I had a Rodeo 4x2 powered by one and it went like a rocket. I understand that a chap in Melbourne bought quite a number of them and modified them to become dual ignition and sold them to the UK where dual ignition is / was mandatory - sold like hotcakes. I believe the Supermarine factory now arranges the engines and does a nice looking gearbox too. I saw one running in the hangar of a mate building his and you could literally balance a coin on it's end on the top of the block whilst it was running (no joke).