> I am considering a 1961 Imperial that is not in my home town and am trying > to determine if the engine is likely original to the chassis. The owner > found the engine ID boss that's located around the base of the distributor > toward the driver's side, but the ID number he finds does not relate to what > Year One says about identifying big block Mopar V8s. He says there is only a > four digit number stamped on the engine boss. In '61 the Engine ID was not by the distributor. Looking at the car from the front the engine ID number is located on a flat pad directly in front of the valley pan/intake closer to the driver side head. Should start off something like XX 413. Steve B.