greenwagon04

good day all. I am wondering if anyone knows what it takes to put my 96-98 ej22 single port into my 2004 outback wagon. I have the ej22 full wire harness, y-pipe, tranny mount. everything i thought would might be needed to swap over. i would like to get away with using the existing 2004 wire harness and doing a little merging. has anyone done this before ?