I have one of the most built Fiesta ST's on the planet when you consider real performance mods backed up with reliability, cooling, brakes, suspension, etc....but would love to swap it all into the Mazda2 if I still had a place to work on bigger projects(full time RVing now) and it would fit. I was planning do do the swap if I ever rolled the ST then found out they are significantly different in ways that would make it quite a challenge if reasonably possible at all.
I suppose I should do a search and see just how far these cool little buggers have been taken:)
Rick