Your drive tunnel is not quite the same. Only one small section has to be cut away to accomodate the trasmission in the Focus, and the hood level is higher as well to clear the engine.
It could work, I'm sure, but you'd be building from scratch and doing trial and error. It might be cheaper to actually buy a Focus with a blown Zetec or SPI and do the swap through Kugel. Same interior space, about the same weight and everything is ready for you. The only if, is whether or not you like the styling
