The rotary arm went on my cab the other day - had to get tow-truck to pick it up, the bloke managed to find a rotary arm to fit in his spares box, but it was not the right one. I went halfords to get the correct type, but the one they listed does not fit!! - I'd have thought that a '92 8v injection engine is the same for the mk1 cab and the mk2 8v, but I guess it wasnt! What one am I looking for ?