That sir, is a slice of heaven! http://www.t137.com/registry/help/otherengines/otherengines.php Check out the numbers on the block to see what you have. I thought my 1949 was all stock unmolested virgin, found out someone crammed a 1937 218 in it. But these really were a decent motor, think they came in cars/trucks to 1959? But they continued to make them up to the 1970's. they were used in airport tugs, industrial applications like generators and pumps, and sold in vehicles over seas beyond 59. They do have full pressurized oiling, and must have done something right, to keep making them for all those years.