68 barracuda 383 id numbers

Core support and trunk stamping will match the fender tag.

10 numbers.
The first 2 are the year and the plant, so yours is probably 82: 8 for 1968 and the 2 is Hamtramck.
The 8 and the 2 should also be the 6th and 7th characters in your VIN.
The last eight match the last 8 on the bottom of the fender tag, this is the Shipping Order No.
The first is the Scheduled Month, the next two are the Scheduled Day, (not the actual shipping date, but a scheduled date), and the last 5 are the Sequence No., (it may be 5 for 67 and 6 for 68).
There is also a different 6 digit Sequence No. in the VIN, the last 6 digits.