74 Dart Sport. Hedman Header Hell.

Like others have said: remove the oil filter. I it has a 90 degree adapter, that needs to come off, too. Jack the engine up about 2 or 3 inches, and it should go in. If not, you'll probably have to take the torsion bar off (not that difficult). When you jack up the engine, be sure to keep an eye on the left side to make sure the other header doesn't hit anything.