Tag, Vin Deck ?, do these stampings look ok?

[69LM1]

I got "part" of a firewall, less than I expected. It was supposed to be a full firewall. The engine was supposedly brought to a machine shop and "freshened up" by the seller. So, if I understand correctly, no one is finding fault with the actual stamping, just the deck and the way it looks? Some have even emailed and said the suffix looks ok, but the vin is suspect?

I have no problem admitting if I got ripped off, I just want to be able to articulate to the proper people when I go after the guy if that is the case. Questions will be:

1. If it's fake, how do all the dates line up, vin, TT and Block casting.

2. If just the VIN Stamp is fake, there is no vin by the oil filter, so how can just the VIN stamp be fake?

3. What in particular distinguishes the stamp(s) as fake? (I know, you don't want to publically state this, yet, no one has emailed or PM'd me with any info on this, just an arbitrary Yea or Nea).

Thanks!

Rich