i have a similar problem with mine, my nearside wheel is sat further back than the offside. I had the same problem with an xr3 as well, had to change the roll bar and mounts. Only problem youve got is turbo ones are thicker and not so easy to come by in good nick as, i think this is a common prob, and the ones i have looked at have been no good. Youd be better swapping for a s1 set up as its adjustable, again if you can get one.