said by Muscles:It's a Dodge. The engine was made in Mexico. I bet the block is made of cast iron. Shocking news, good luck.
Block is cast iron, but the heads are definitely aluminum.
"Don Sherman, writing in Automobile, noted that the cast iron block has a "meaty" deep-skirt design, with a crankshaft supported well by four bolts per main bearing (two vertical, two horizontal). The heads are aluminum, with the usual Chrysler plastic intake manifold. "