can anyone decode these numbers for a 12 bolt and determine what it came out of? the numbers are as follows: 396934NF GM66

back of tube: 12345 1890 J88
C-BF- 11246

Thanks any help appreciated; Person claims out of 67 firebird.

Are you sure the last "6" in the '1124(6)' code is a "6" and not a 'G' ?
Is this a 10 bolt ?

It is possible it could be a 6 and not a G and they claim it is a 12 bolt with 3:31 gears. Thank you.