I have an idea for a Future build, I am wondering sort of what im looking at if i want to swap a motor into a gc8 impreza, I pretty much dont know anything about subaru's so

1. which motor would be the best (money/performance)
2. how much does it really cost to do something like this I dont just want to swap the car either i want to do more to it

Realistically, im trying to make my own 22b or get it pretty close