Paulm321 - Very slick looking conversion, Ford Zetec I'm guessing?
I particularly like the plumbing for the radiator. Having toyed with a Land Rover header tank and decided that the plumbing would be a bit too complicated for its own good I'm thinking of using an in-line filler cap mounted at the highest point on the system linked to an expansion bottle.
As that looks like what you've got there, any hints and tips would be appreciated.