Got the muffler by USPS today. Looks NOS with a bunch of minor dings, one moderate ding. Came in an original looking box with very old and dried out packaging tape so it looks original. The muffler color is a Ford civvy green which happens to be exactly the same color green my original transmission color is, (posted a photo about that in an earlier thread).
I installed the muffler and it fits perfectly in the original muffler brackets.
BTW they don't have the tailpipe. I asked them if they had any GTB numbered parts (and asked if they had any Ford GPA or GP parts too). They said they don't have any "G numbered parts".