Bro I just did a focus engine swap search in zetec performance for focus engine. I even wrote up a quick how-to that the moderators should sticky, hint hint. The MTX 75 from a 4 cyl will fit the focus engine, but will not fit a 6 cyl engine because of a different bellhousing bolt pattern. The trannys are basically the same internally but the integrated bellhousing is different between a 4 cyl and 6 cyl.

ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap