Cosworth running gear bolts up as iam using it . The only problem Is the crosshaft that runs through the cosworth sump for the fwd . The zetec and cosworth blocks are very similar in size etc but crank must sit in the block a bit higher than the zetec as the front of cossie sump is very shallow to sit over the steering rack but the zetec needs atleast 85 mm depth to clear the crank so you have to raise the gearbox and engine up , then run dry sump and custom build a crosshaft which is solid mounted to the crossmember , a lot of work lol.
you should talk to Djm Motorsport in Lincoln he build fords and evos and also does custom made gearboxes but he's not cheap.

cheers paul