the engine doesnt need to be out to install the fuel pump..... doesnt even change the difficulty level....... also, the intercooler is not mounted to the engine, not in this engine at least, so it doesnt matter either. FMIC's are mounted up front and can be done at any time as well. its the pipes that connect it that are connected closest to the engine, and for this, the engine has to be installed so u know where to make the pipings go through (once inside the engine bay, u need to find the space and best route to make them go through).
the engine will already come with the manifold, no need to get a different one unless he wants to spend some extra money (which is probably unnecessary). the downpipe is easy to connect, and has to be put after the engine is installed (the longer ones will just make the engine installation more uncomfortable).
the radiator.... in some cars, yea, its a bit easier when the engine is out, but not that much. its hella easy in my car. 2 hoses, 2 brackets, and its out. those with electrical fans just have to take the fans out, thats it, and the SR has a crank driven one.
Supra: To surpass or go beyond.