We currently have a 2006 Mk6 fiesta ST rolling shell (rally car) We need to keep engine under 1650cc so looking at zetec s engine which we will tweak, but we have been offered a Mk7 1.6 zetec s race engine (155bhp) does anyone know if it's possible to fit engine and box into Mk6 from Mk7 fiesta or have any other ideas.