[Lynn]

Kevin. It would help if you could get a good shot from about 12 inches away. Try and get part of the block that also includes where the head gasket would be. Something like the one attached to this post.

Also, take a straight edge and lay it across the deck. Look to see if there is a bit of a gap at the part of the block where the stamp is. Some guys will use a belt sander to clean off the old stamp, stamp in new numbers and then "age" it by dabbing on some muriatic acid.

There are some guys on here that may be able to tell if it is a restamp. I haven't looked at enough big block stamps to know for sure.