Here's what I've come up with for the numbers I have:
VIN: 166375JXXXXXX ('65 Impala SS 2dr Sport Coupe)
11C : November, 3rd week
ST 65-16637: Impala 2dr sport coupe, 8cyl
Body - JAN3622: ?
TR 879: Impala SS, red interior, vinyl, bucket seats
Paint R-R: Regal Red lower & upper body color...