V1WRC

Hello everyone, it has been a while but i have done it again and bought another impreza!! I have a few questions and i hope you will be able to help as you always have i the past. I own a 93 wrx, drivetrain is faultless however the body is rusted to a point where it can be repaired without a hige amount spent on it.
i have just bought a 2001 2.0 sport (non turbo obviously) and it is immaculate! 67 000 on the clock one family car and always been in a garage.
next on the question list is i have an apexi power fc 3 connector ecu. What is the best way to put it all together. Ie will a uk2000 inlet manifold and engine harness plug into my ecu and the car itself??
sorry if this question is a pain but thought i would ask and see if anybody had any ideas??

V1WRC

Its a 2001 registered classic. And im obviously planning on using my 93 wrx block and heads and expect to have to buy a later inlet manifold.