JOSH-
well if you do not know anything about cars, and you say it had that grille / faschia when you bought it, I bet its the factory 4.6 V8 engine then. Would be a lot easier to get 4-500 HP out of one of those with a turbo or supercharger than a piddly V6.
Do us all a favor ok? Tell me how many spark plug wires you have please
(when u pop the hood there will be identical looking wires near the center portion of the engine itself, some going to the left side some to the right, all about what, 1/4 inch - 3/8 inch in diameter and most likely black in color? Count them all and let us know. Its either going to be 6 or 8)