Yes, the S2 is the problem one! The gearbox x/member gets in the way of fitting standard S1 or RS1600i front end parts although they could be modified to fit.

At present I am looking at making some new corner plates to locate some tension struts like the S1, rose jointed at the front end and a solid adjustable knuckle joint at the TCA end, that's simple enough but the anti roll bar is proving to be the problem.

Sourcing a suitable arb that will mount from the new corner plates and clamp to the tension struts is the difficult bit.

There's something to be said for running without the arb, I'd like to try that on an S2 and get some feed back, after all Ford never ran one on the GpA RS Turbo rally cars and neither does NutsRus on his RS1600i rally car.

Martin