Now the previous owners of my zook have not been modders, the thing is stock standard. So I dont believe they changed them on purpose.
My mate rang his distributor who said
My car is a 1992 Suzuki Sierra Widetrack..The guy there said it's possible that your car has a different rotor on it, perhaps either a 515 (from a Suzuki Wagon R) which is about 60mm smaller in diameter than the original unit, or perhaps even a 514 off a Suzuki Estate, which apparently would have required a caliper change to fit.
what kind of brakes should it have?