It is a Pagewood built HQ Deville, so 308 trimatic. GV1 is 3.08:1 Salisbury. VIN will be 8S69TDH815150Q.

20639S is the Pagewood BODY number. This is how they tracked the car through the assembly plant. They used to use the chassis number on HK-G and earlier but when this moved to the chassis rails on HQ they had to use a firewall body number as the rails didn't go on until really late at Pagewood.