Help with Fender Tag Decoding

Thank you sir, what about the rearaxle code "1" ANYWAY TO TELL IF IT IS AN ORIGINAL 8 3/4 CAR?
SGBARRACUDA said
BH29= Barracuda-High-2door sports top
41= 318 2 bl.
5= 3speed automatic
23=tire code
307= Build date March 7 1968
Vehicle order number=279246
H5B=blue vinyl interior
UU1= Light Blue Metallic paint single color top and bottom
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