I am having a similar dilemma. I am looking at a 72 911E which has had a remanufactured engine installed a couple of years ago by an earlier owner and I am trying to identify it. The fan shroud has been painted red - has the #901 103 101 5R cast on the top and 652 0935 stamped on the flat vertical surface where the engine serial # is found. The heads say 911 104 306 0R and the cases 901 101 102 3R and 901 101 101 4R. What is it???
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