Thanks guys for the info.

Think i am going to keep the standard arches but maybe go for the short 5 link boxes and see if i can pick up a baby atlas, depends if i can get 1 cheap enough.

Good luck with the 4x4 conversion, lots of welding for that 1.
My mate back home has done this and is running the granada cossie V6 with twin turbos through the 4x4, is always crackin the shell and is always welding her up as it is just to much for the shell, he uses this for autocross and it is something else to see and hear when out in the grass.