Help TC won't drop in place

What's with the double secret probation garbage.

Look on the pan rail, same side as the shift mechanism. There is a PK#######

Also there may be two additional 4 digit sequences. If it has 9C271xxx on the vin pad, that's a 1969

341xxxx is usually a 1970 model year trans.

So it's should be the later spline, unless someone swapped the parts.