Ok I have this swap its very simple actually If I was you just use your harness but the JDM ECU and Engine and that will work

. I did notice a huge bit of power in the low to mid range. Top end felt about the same but since after the swap i didnt have a speed sensor or anything I could take my car to 135 which was fun for once. Wont do it again the car doesnt feel to great up there feels to edgy. But man it makes your car quick as shit I would eat New Gt mustangs

. Ran a few turbo civics and ate them. GSR's. a RSX type S. but I ran a new Z and he ate me off the line 3rd on we was pretty even. But I mean now my engine is shot. Rings are going, I know my compression isnt the same and I got a oil leak somewhere around the back part of the head. Not bad really at all jus a little one. My fault for letting it over heat. But basically Swap will change your car a bit. Its like taking a 7th gen GTS and putting a Lotus Elise ECU in it. Bitch pulls like a mother

its a new beast after that ;-)