1968 used 9 digits: ?8Xxxxxxx
? = Plant (B - Hamtramck, MI or G - St. Louis, MO)
8 = Year (1968)
X = Body (Charger)
xxxxxx = Shipping Order Number

1970 used 8 digits (& a space): G0 225646
G = Plant (G - St. Louis, MO)
0 = Year (1970)

225646 = VIN Sequence Number

So, without a VIN tag ..... your Vehicle Identification Number was X?29?0G225646, how will you determine the unknown?