core support/trunk rail stamping
According to OP. He has the vin on the dash, engine and trans match it. Problem is the rad and trunk stamping do not corospond to his vin.
He does not have a build sheet or a fender tag so he is trying to figure out how to get a build sheet or the like to know what his car should have.
The vin reads to be a GTS.
IIRC Chrysler Historical used to be able to produce a build sheet or the like for some VINs