Is the "Core Charge" for and engine before or after the initial price. Like say I go on car-part.com for an engine and the price is 1200. The description says 500 core charge. Does that mean I have to pay 1700 or is it 1200 and then 700 if you give them the old one? Can somebody look in to that for me, I asked my Dad, but I cannot trust him for true info because he has been dead against an engine swap since the getgo. He thinks Crossfires are garbage. He should be burned at the steak for blasphemy.