This question has intrigued my for some time. Checker cab used the Continental 226 L head in their vehicles up to 1960. In 1960, Checker came out with an OHV version of the 226 Continental L head engine. Everything I have found so far indicates the OHV version was used from 1961 to 1964. After that, Chevrolet engines were used. I have posted 2 pics of the Continental 226 OHV engine. Notice the distributor is down on the left side of the engine and the spark plugs go in the head below the intake manifold. I'm looking for more info at this time. It was offered with a 1bbl carb and later with a 2bbl carb rated at about 141HP. As near as I can tell, this engine and parts are very scarce, but let's see what turns up. This is not the Willys 230 Tornado engine. This is a Continental 226 based engine. The 230 Tornado engine is also a Continental based design used in the Jeep trucks beginning in 1963. This is an OHC design, with it's distributor on the right front of the engine.