a friend has a ka 2.1 zetec turbo 4x4, it uses the mondeo running gear i have pics before i get avvused ofblagging lol, its running 380 bhp and, he upgraded all bearigs etc in the box, dif and transfer box etc, it handled the power just fine for 8000 miles of track abuse until it got ripped apart agin to do more mods, then he ran out of money, now the whole car is up for sale as unfinished project but if you sort the bearings etc you should be fine, oh and you need a swirl pot(i think thats wat its called anyway lol) or somehing to increase transfer box oil capacity