Zetec turbo is a little different .

I wouldn't know where to start recalibrating the Mfi metering head.

So Efi it is.

You have the,

Chipped Escort / Fiesta turbo ecu. Is it Ofab ?
Focus Rs ecu. Don't worry about Pats.
After market ecu, Mega squirt, omex ect ect ect.

All down to budget and ability and the power out put you want.
Mine is on Focus Rs management.