remember if your keeping the focus engine management youll need to swap over the whole engine bay loom and the whole PATs wiring too so you dont get any snags.

The RS dash will fit too and if your fitting the entire subloom from the focus youll need to fit it as it uses a databus to do revs and speedo.

If your going aftermarket ecu then if it cant do databus communication to the dash then keep the puma dash. the puma dash will run off a ford speed sensor and a tacho feed which most good ecus can do.