This car has got KE-Jet:

http://fordescort.britec-online.de/s...php?show_id=59

Don't know exactly where the knock sensor sits on this engine, iirr it's screwed directly onto the bottom end. If you use your turbo one, be sure it will sit on the right place or it won't fit. So you can't use the breather screw.

Conversion to EFI can also be done. Throttle housing can be used, modifications for the fuel injectors are the same if you want to convert your ERST manifold to EFI