I'll take some measurements this weekend and report back. Photo below of how much is going into the tie rod end. The struts are not bent, and not sure if the XM has been redrilled but will have a close look. This is from a thread I found on another forum from a while ago when looking into this:
MKI rack is shorter than a MKII.
I've fitted up hubs that have had MKII Arms on Cars with MKI Racks and found there's not a lot of thread engagement in stock steering rod ends, so some care is needed. I also found that there is a lot more noticeable bump steer with this arrangement.
Everyone I have spoken to about this say Mk1 and Mk2 racks are the same dimensions, except of course for the metric vs imperial track rod ends, and the Mk1 rack having 15 teeth and the Mk2 rack having 25 teeth, perhaps not?? 
Can anyone confirm the length of a Mk1 and Mk2 track rod end? Just looked and found some Mk2 TRE's for sale on Ebay that are 240mm long. I'll measure mine and see how they compare.