I have never opened the case, so it makes me nervous to think about it. But from what I have seen and read, it is easy. Just stay organized and plenty of work space.
Racing brings all new rules to the game. I have used some wierd shit on cars for a quick fix. LOL...Coke Can Freeze Plugs and Gaskets, Cigs or black pepper in the leaky rad, Zip tie bolts, ext.....