you really dont need a throttle body of that size unless you are doing Forced Induction... like Hector, he had some problems with it, but he also has a Supercharger that was designed for a focus in it. So thats probably why it fits on his car. I dont think its worth it to spend that much money on a N/A Zetec for a throttle body.
As for your SVT zetec question, it has been discussed NUMERIOUS times. And you COULD NOT attach the SVT zetec to an MTX-75 Gearbox. You would have to use the getrag out of the focus also before anything fit, then redo the roll resisters and trannie mounts... Ug there is so much work involved, it would be a big mess.
