it's typically a conversion going the other way...3 wire to 2 wire. you'll need to run a wire from a13 to the 3 wire plug and move a12-a14. you'll need to get a y7 throttle body or auto y8 throttle body w/ the 3 wire iacv and a 3 wire plug that'll fit it.
the attached pics are going from 3wire to 2 wire, so you'll need to go backwards.
did the y8 head get damaged? you may be able to swap the y8 head and just run the y8 ecu again.