I think if you order the "options and accessories" package from Galen this includes the workup in production numbers of your car with the options/acc's that it has. Tropical, did you order this as well?
See the Galen letter in this eBay auction (cool 3-spd R/T!!) and you can see it includes assessment of production number in respect to how it was equipped:
http://cgi.ebay.com/ebaymotors/1971-Dodge-Challenger-R-T-Shaker-383-3spd-1-of-1_W0QQitemZ4634497882QQcategoryZ6198QQrdZ1QQcmdZViewItem
Maybe thats why its taking a long time with mine....
Just got off hte phone with GTS. A very nice woman answered these questions for me.
Q. Is there a way to tell if your car is 1 of 1 or 1 of 2000.
A. No.What we can give you is information hat may help you to narrow it down,but actual number do not exist
Q. What will the Options and Accessories report tell me.
A. It will tell you what options were available for your year and the percentage of cars in that year that got that option. This could be a place to start to narrow down the rarity of you car.
This one was for David..
Q. How long will it take to get the Options and Accessories Report.
A. I think I have some in stock I could send it out today.