Motion Replacement Engines

[vettebuilder]

SO, back LONG ago when I was much younger I was thinking of purchasing a motor from Motion for my 1974 Corvette. I still have the old original Motion catalog and some original decals they sent. I managed to hold onto some of the the original Motion items I bought back then, like the Lemans gas cap, the fly eye air cleaner, Mallory super coil, and some valve covers. That was as far as my budget got me back then. When you ordered a Motion big block engine from the catalog, did Motion stamp it in any way to verify it was from them? I don't understand why people are saying that CE engines came from Motion while others say blank pad engines came from them, and even one person said they were stamped with MP. There seems to be a lot of questionable material about the engines, and I am still having difficulty sorting thru it.