JFYI, the M-551 Sheridan, still in use by the Army Airborne, I think, uses the 6V-53T. The Gamma Goat, which I think is obsolete now, used a 3-53. The M-578 Retriever used the 8V-53T. Amazing engines.
BTW, the M-60A1, before the RISE Passive model, used a Continental AVDS 1790-2 (Air cooled, V (-12), Diesel, Supercharged (actually turbo-charged.) 1790 cubic inches and approximately 600 horsepower. This engine is a distant relative of the V-12 Liberty engine used in aircraft during WWI and WWII, I think.
