No identification pad on 4-speed?

I'm working on gathering some parts for the restoration of my '68 Barracuda convertible 383-S. Yep.:headbang: It's the real deal but had the big block and 4-speed robbed from it years back (still looking for the originals but that's a whole other story...lol) Anyhow, I just recently purchased a 4-speed tranny that supposedly came from a '68 Dart GTS. It is an A-body tranny but it has no identification pad where the numbers should be stamped on it. No sign of there ever being one either. Anyone ever hear of such a thing? I believe this tranny came from Mexico if that is any help. Did they not have the pad on export parts? Any info would be appreciated. Thanks, Don