Finally got the 8 plug head fitted. What a struggle with plug leads. Had to "prune" some fins from the top of the head. Attached some photos for you of various mods done before it went back together.

Ran it at a race meeting on the weekend and seems to have much more mid range poke. Got a 1st and 3rd in round 1 club champs! I will get it on the Dyno for fine tuning later and report back with figures!!