Be Careful of What You Let Get Away

Posting pics of something unexpected. This a 318 out of an HD A/W Ramcharger. With a big I cast in the side. I presume for industrial. The major thrust axis of the cylinders are 5/16 inch thick from the top of the deck to the bottom, and there’s less than 1/8 inch between the cylinder walls. Odd find for a hydraulic roller engine.