The short answer is no.

The turbo EEC4 software and normilly aspitrated software are incompatiable.
The fact the ecu's shared the hego and CO pot input shows that different software
is being used.
It may be possible to remap the non turbo ecu to run turbo and the hego sensor
but this would require MUCH development it would probally be cheaper in the
long run to buy aftermarket managment and do it properly.

EEC4 is an tempramental system at the best of times and is easily confused
when things go slightly out of tolerance.

If you really want turbo eec4 with lambda then how about retro
fitting the small turbo cossie eec4 system.
You would have to add the air flow meter, cam sensor, hego sensor and
of course the ecu. Then get it remapped to suit your engine !!!

Still cheaper to go aftermarket though !!!