Raffaz09

So can it be done or is it just a plain head f&:$ thats not worth doing and will the car run alright because from researching theres not a huge list of differences

Hey guys just wondering i currently run a stock engine in my 33 s2 but have blown piston number 6. I have another offer from a friend to put his 34 gtt neo engine in but wondering how shall i go about it using the s2 loom and ecu??? Thanks