ej20 engine wiring

I want to swap the EJ20 Engine and 5speed Manual Gearbox in my Subaru Outback/Liberty Wagon 1999 model, it has selective AWD. I want to replace it with an EJ20 Engine from a Subaru RX Impreza Wagon 1998 model, 5 speed Gearbox with only 2WD. I have added some photos of both harnesses which might help. The 99' OUTBACK/LIBERTY engine harness has  "1x14 pin(brown) + 1x19pin(white)" plugs, while the 98' RX IMPREZA engine has "1x6pin(white) + 1x8pin(grey) + 1x16pin(grey) plugs.  Is there an adaptor plug that I can purchase or do i need to get something made up or swap engine wiring harnesses (which i am trying to avoid doing)?. I also noticed that the ECU plugs(both located on passenger floor) are also different on these 2 models, any information/help with this conversion would be great, also how do i confirm what size the engine is 2.0l-2.2l- 2.5l?  They are both EJ20 engines and im pretty sure they are both Australian models (i bought them both in Australia) 

                                                                                          Thanks in advance          

                                                                                                                            BEAU83

I am putting a EJ20 engine and gearbox out of a  "1998 SUBARU RX IMPREZA wagon"   into a   "1999 SUBARU OUTBACK/LIBERTY wagon"....

I have tried changing the Intake Manifolds with Engine Wiring still attached but the Intake Manifolds are different in size.

Edited September 10, 201510 yr by beau83