It's been a while since I looked at this thread. Not heaps to update.
I'm still playing with the thermo fan switch trying to get one to turn on at the right time.
I think I finally got it but it leaked because there wasn't might for the thread to bite into.
So got a mate to weld a flat piece of alloy so the switch seals properly.
Haven't tried it yet but I hope it works and no more leaks.
Also got some leads made and bought some lead separators to help neaten up the engine bay.
I was going to use the billet alloy covers but didn't like the look of them, they made the engine look too wide.
Other than that it's gathered a nice thick layer of dust on it sitting in the shed.