There is a guy in Western Australia that has put V6 cosworth engines in lots of his cars MK1 Cortina convertible, MK 4 Cortina convertible and corsair he is in our RS owners club if there is one about he will know. there was 2 4x4 Sierra,s for sale on gumtree last week in perth as well I think one of them was a XR4x4.