Running engine or not?
If car is not running then build engine but do not run the car without the PowerFC, wait until the engine is in the car then put in PowerFC and run it. So answer is both.
If engine is running and you are thinking about building the engine, then ofcourse get PowerFC first. It would run if you are NA, turbo GTS, or build engine turbo GTS. You should have your management ready before your built engine goes into engine bay or leave car sitting there without starting until you do.
If car is not running then build engine but do not run the car without the PowerFC, wait until the engine is in the car then put in PowerFC and run it. So answer is both.
If engine is running and you are thinking about building the engine, then ofcourse get PowerFC first. It would run if you are NA, turbo GTS, or build engine turbo GTS. You should have your management ready before your built engine goes into engine bay or leave car sitting there without starting until you do.
