440 install

Hey everyone, I'm new to the forum, I've come to the forum because I'm hoping to get some help from some Mopar people since this is my first Mopar build. I have a 64 Barracuda that I'm trying to put a 440 in. The engine is almost complete but before I go any further, I've heard mixed things about it from different people and I would really just like to know what all I need to do in order to make it fit in the car?