I've thought about (After seeing similar) milling a dashpot that can accept a single injector, to feed fuel to the engine in a similar manner to the carb, retaining a fairly standard appearance. It's been done with good results.
Fuelling maps off other cars isn't too hot tho, using other cars ECUs on engine not intended for them can cause trouble and most manufacturer's ECUs aren't reprogrammable by default, or only by marginal amounts.
The way forward would be to use Megasquirt and build either :
a) A plenum system, as seen on most modern cars (Hell, if it works for Ferrari, it must be good). Use a single large throttle body off a 2 litre Zetec or similar, make a brand new manifold which takes 4 injectors, one for each runner and voila!
b) Use indivudual TBs, which is possibly the best solution as each cylinder gets its own throttle and breathing space.
To do an EFI conversion using MS you'd need (bearing in mind it can be had in kit form for not much too):
- Crank trigger wheel (36-1 tooth)
- Trigger wheel sensor (antoher Ford item)
- Injectors and bungs
- Appropriate manifold
- Throttle body/ies
- High pressure fuel pump,
- High pressure supply/return lines, and rails,
- EFI fuel pressure regulator.
- Coolant (CTS) and intake air temperature sensors (IAT),
- An oxygen sensor (EGO) is highly recommended, either narrow-band or wide-band, and threaded bung,
- Wiring and various connectors for the sensors, injectors, etc.,
- Coil pack (Ford EDIS) leads, suitable plugs (important!)
- The ECU and suitable harness
If you home brewed you could probably do the whole lot for 300 quid, if you really knew where to look and were happy to get dirrrtteeey.....maybe a little less!
http://www.megasquirt.info/