Im after a pre 1992 ideally, 1.8 silvertop Zetec engine. Not bothered if it doesnt work etc. Cheaper the better!

Aug 1995 is the cut of for Iva. You are really limiting your self with pre 92 as that's very early in its production.

Up to that date will be fine then i guess

For emissions and catalytic converters 92 refers to production cars and Aug 95 for non production cars.

There is / was a flow chart in the Iva manual