Those things smoke and make the most toxic fumes I've ever smelt. they were retrofitted in M36 Jackson Tank Destroyers that the Commies used after WW2. We had given them to various post war contries that eventually wound up in the Soviet sphere like Yugoslavia and Czechoslovakia. The Russians replaced the American gas engines with the T-34 Diesel variety. They then got reimported to the US in the 1990's and I got to play on a few. Noxious beasts but they did work.