Engine is near built for my mk2 orion. . . Just struggling getting a new oil pump for the 2 litre zetec turbo build. Ive been told you need to use a 1800 oil pump in a orion mk2 or escort mk4 bay. Whats stopping me fitting the 2 litre oil pump. Has anyone on here fitted a zetec with the 2 litre oil pump?