98RS, 98RS, 99RS
I would personally try to source another ej20g because they are stupid cheap to buy and you can find them everywhere. If I absolutely had to swap over a 205 Id personally just go with the entire body wiring harness and wire all of the accessories. There's a fair bit of wiring involved upgrading to a newer avcs engine that effectively is the same as if you were swapping a turbo engine into a non turbo car, or any other type of swap. It's possible someone on here has done this swap and can give specific info.