4x108
Escos is different to any other Ford with it's ET25, so wheels from other Fords don't fit well.
As to turbo choice - if you are able to map the car you will have the best of two words if you get GT-28RS. It is available in vesrion that will be direct fit for Escos and should give good spool-up and nice top end power. I can't see you becoming sucessfull in american AutoX with an escos angainst modern cars without HUGE suspension mods though.