I'll stick my neck out on this one. Lots of people smarter than me will correct me (well maybe not, we'll see). Lots of opportunities to correct me ....
Nearly all cop cars were Belvederes in '68, with a few Satellites thrown in. (Maybe 90%-10%). You hear stories of cop Road Runners but no one has a documented one. (Anyone? Post the info if you got one!) So I'll say no to the cop GTX.The "N" you see is an inspectors stamp from Lynch Road. It embossed the tag, and didn't punch through like stamps from St. Louis builds.
I note that the tire code is 44. That's for a F70-14 RSW. Pretty typical tire for a B-Body. The cop cars would have used an upgraded 8 ply tire, and the codes are 56 and 59 for 14 inch wheels, and 66, 68, 78, and 79 for 15 inch wheels.
I think you found a GTX. Still a special Mopar.
The confusion here is when people that try decoding their BSs (broadcast sheets) for the first time and they decode things like "police brakes" and "police suspension" they assume the car was a police car. Not the case.
If you look at the original dealer data book info you will find that Mopar simply used those police items when equipping the hipo cars such as RRs and GTXs. There was a lot of this kind of thing done simply because it worked and was available.
Beginning in 1969 the marketing people at Mopar decided that calling the police suspension "HEMI" suspension sounded a lot "cooler." That suspension and the police brakes had already became standard on certain models begining in 1966 or earlier and optional in some packages like the trac pak and super trac pac packages BUT they were still just the original police items which individually carried the police item sales codes on the BS.
Another thing in this same vein is the coding for a 1967 Coronet and Charger R/T has a sales code of 363 on the BS that is decoded as "special body
style-R/T Coronet, Charger R/T" Even though the Coronet R/T has it's own specific identifing V.I.N. and the Charger when equipped with the 440 engine in 1967 never carried the R/T badging. The 363 sales code triggered the coding of the other things on the BS that made these cars what they are, in other words the engine, suspension brakes etc. but some of those items still carried their own specific sales codes.
CONFUSED YET??
Yeah, it is very confusing to decode BSs and understand what everything ACTUALLY means even after you have decode it.
This is the very reason that I do not decode BSs here when people post them asking for help. It is VERY time consuming AND things like this always come up that requires considerably MORE explaination and fills up threads like this one.
My advise to people that are interested in decoding their BSs is to buy GGs white books that apply to their particular car, study it and have their hand at decoding it. If they get stuck on something then post it and you are much more likely to get some help on an as needed basis. People are much more willing to help those that have shown some inititive to do this on their own first.
For some help getting started read my comments in the link thread below. It will give you some ideas of what some of the particular BS lines refer to. Keep in mind that these lines sometimes change depending on what year car you are dealing with. Also the entire sales coding system changed beginning in the 1969 model year.
As you will discover the deeper you get into this the more complicated it gets. I would recommendv that you first try your hand at decoding fender tags. They go hand in hand and will help you later when you try broadcast sheets.
http://www.forbbodiesonly.com/moparforum/showthread.php?t=18598
