i read an article/interview a few years back on this subject, interviews were with holden, ford and whoever heads up v8 supercars..
suprisingly, holden said they were keen on having mitsu get into the v8's.. however ford and the ceo/whatevery of the v8 supercars said they werent keen.. bit dissapointed with ford on that one.
i watched some nascar/pro street truck or something like that a few weeks back, the yanks are racing toyota camrys and toyota tacomas (hilux) in the comps against the usual ford & chev cars.. it was so refreshing to see something different, just a huge shame that americans race around oval tracks.. blegh! boring!