SUBARU110176

Hello, I currently have a 1997 Subaru Legacy Outback(ej25)2.5 automatic that has a head gasket on it's way out. I found a 1997 Subaru Legacy(ej22)2.2 motor that came out of a standard tranny, I am just wondering if anyone has tried this swap and what problems I may occur while doing this. Also can I use my computer with the ej22???? And are the wiring harness are plug n play? I NEED ADVICE