This ZZ4 engine was purchased used from a Chevy dealer as a warranty return. The engine was originally bought new and installed in a Monte Carlo. The engine was making a ticking noise after it was started. The ticking was caused by a bad distributor. The engine was pulled and returned to Chevy. Engine is complete from manifold to pan minus distributor. The heads are the early style round ports. Asking $2500 or best offer.