2 things will happen here:
1- you will lose the commercial (civilian) certification for the D22
2- you will have no fuel flow indication.
The T56 engine uses a 28v DC power supply for the ff transmitter and indicators, while
the D22 uses a 115v 400hz power supply. The wiring and connectors are completely
different.
In my opinion this would be a completely wasted excercise, not to mention the expense
of recertifying the D22 again