6.1 year ID help needed

Mcat is correct, to a large extent, but there is difference between the exterior bolt ons, depending on whether the engine came out of a car or a Grand Cherokee. The oil pan and exhaust manifolds are different and I know the alternator is different and bolts up differently. Some of the front accessories, if not all, are different too.

Installed in a classic car, you likely won't use the stock oil pan or exh. manifolds anyway. The main "long block" is the same between the car / Jeeps from '05 through '10 if you need anything internally.