Another fender tag Question

I have looked at links and googled until I am blue in the face and can't quite find what I'm looking for. I have a 64 Dart GT..Under A-5....F-1....H-5...M-3....N-8...Q-0...R-2...T-8

SO Number BDY TRM PNT
0128 6219 742 P4X PPBB

So far all I can figure out is the SO NUMBER and TRM but nothing else..Don't particularly want you to do it for me but at least give me a link to a site that shows you in layman terms.I mean I understand BDY is Body but what the hell is the 742 referenced too.Clear as mud??
Thanks for any help.