twinturbowrx

sooo i wanna do a wrx swap, as of rate now i have a older wrx engine the one that came with the td05 and a 97 impreza for its new home i know that pretty much everything bolts up and that isnt really my issue but when it comes to the electrical side thats a entirely different story. id like to stay with a factory computer no stand alone or piggyback ive found some wiring here http://cgi.ebay.com/ebaymotors/02-06-Subaru-Impreza-WRX-Wire-Harness-Dash-Motor-Tail_W0QQcmdZViewItemQQhashZitem3efa2c7e0cQQitemZ270485192204QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories but im not sure if this is exactly what i need because i might not have this sensor or that sensor for the newer harness and i dont want a cel light and then also i know that i cant go to new with the computer because im sure that the engine doesnt have avcs i think thats the right acronym so if anyone could help me in the right direction with what exactly i need because ive read nermerious post on wrx swaps but i dont really have the space to go and buy a wrecked wrx and swap the dash and everything else wish i did would so make this alot easier :-\ ps i would also like to be able to flash and tune the ecu and all that good stuff so what years was ecu was that possible with