This AMC 401 V-8 engine build was spurned by necessity. When the stock 360ci engine in my ’79 Cherokee blew speed holes out the side of the block and broke the camshaft in half, an entirely new engine was necessary. Starting with a 401 was a stroke of good luck, as we were searching for a stock 360ci replacement when a 401 popped up on Craigslist first. The pros of starting with an AMC 401? While it has the same architecture (as a 304ci or a 360ci), the 401 came with a high-nickel-content block, a forged crankshaft, forged connecting rods, and larger 2.248-inch journal bearings.