OK, here's what I've been able to find out about the engine without having to take it apart:
It has screw in freeze plugs and cross bolted main caps. The number on the front of the block on the drivers side reads "67" on top and "352" on bottom. On the bottom front of the block on the driver's side near the
oil pan it reads "W" on top and "8J2" on bottom. Near the dipstick hole is reads "12" on top and "DW" on bottom. On the cylinder heads it reads "V51" and on the manifold it reads "C6AE9425-H".
What does all of this mean? Can I say for sure if this is a 427? I'm going to put this up for sale and I don't want to misinform anyone, but as I said before, I'm not a Ford man, I'm a Mopar Man so I don't know jack about Fords.