so long as youve both engines you will be able to take the parts of the one to adapt mistral one to fit only thing i think your gonna have to buy new is spigot bearing for end crank as doubt itll come out in one place if i were u id put new clutch kit in whilst its in bits hate to take it to pieces again 6mths down line fuel filter and stuff use your cars orignal one, all this suposes your not doing petrol to diesel conversion, and mistral engine isnt the intercooled model which may need bit of fabricating to get intercooler in.if you send picture to mav hell get it on and well soon see any differences