I'm very interested in finding out more about Police packs and how they are identified. I've just read a post that MB wrote last year (is he still posting in here?) about a HX 50th Anniversary model and there was a very useful list of all the options. MB also mentioned that BT1 was a police pack. So... because I have a HZ Kingswood SL ex-police car I'd like to find out more about police options. What exactly was on the option list of a BT1? Did HZ also have a BT1 option? I wrote to Holden and provided VIN, body and eng numbers for my car but all records have been lost of the period mine was produced (11/79), so they cannot tell me anything.