Just to add that if it is the 2 litre fiat engine (and what a brilliant engine that is) then you have a plus 4 not a 4/4
The first Fiat engined 4/4 a 1.6 litre went into production in November 1981. Maurice Owen then got hold of a fuel injected 2 litre version and fitted that in a 4/4 using the new injected V8 fuel tank. This led to production versions of the 4/4 with both Ford and Fiat engines, so to separate the performance gap the Plus 4 name was re-introduced for the 122bhp Fiat version, but not until Spring 1985 after a gap of 17 years. This according to Gregory Houston Bowden.
