So I have a 2018 wrx with a spun bearing. I called a shop they estimated $20,000. I feel I can do it for less. I am starting to take the motor out tomorrow. The built short block should b here this week. I know I need the heads re surfaced and cleaned and a new gasket kit and timing chains oil pump/timing cover and oil cooler. Is that it or am I missing a lot of stuff. I have never built a motor before so I feel like I’m missing a list of stuff that I need to do. I just don’t know where to start any help will b greatly appreciated