Hi New member with an Rootes Group engine that I need to identify. I have a 1966 Sunbeam Alpine that I purchased recently, a series V (project car) that has been off the road and in a barn since 1972 with some work done that needs to be finished and put back together. The engine was rebuilt and is supposedly a 1725 (not running), now the delema... the engine number stamped on the block is not the same as the vin# of the car. Now I am told the previous owner replaced the engine as the original had a broken crankshaft, and that he rebuilt this engine before placing it in the car. However the engine # does not appear to be a Sunbeam Alpine Engine number. My question to the group is this, can anyone out there help me identify this Rootes Group engine #B21106389 LSX with the letter H stamped below the engine # Any help you can give me to identify what this engine originally came in from the factory and any specs on it would be greatly appreciated. Thank You New Member Bob in Atkinson, New Hampshire USA