Well, the guy answered my email....sorta. He'll give me a better idea of whats going on after he's back from vacation. Heres what he said.
I am on vacation in Florida at the moment and have no access to my work pc (not that I want access anyway!) We recently tested a Tbird in the UK and expected to have to beef up the rear but I don't think this was the case. I think the Cobra front and Storm rear worked perfectly but will let you know for sure in 2 weeks when I'm back.