basically if you can find a crashed fiesta turbo your laughing,it has all the parts you need ,only thing you could do with changing would be a turbo from an escort as this has a T3 and would help a lot in the power stakes,and and an escort downpipe of the exhaust then its a case of making up your own exhaust using an escort system!,the efi is really good as you dont even need to change the loom as its already there,things like the map sensor,ecu etc obviously you would have to change from the fiesta! other than that just make sure the engine itself is a turbo block (if it has low compression pistons thats a bonus),other than that you will
have to upgrade the fuel pump to an escort cossie one if you want to raise the boost at anytime as well as beige injectors! hope this helps