Welcome to the site
I'm glad that you covered your Challenger purchase by obtaining physical documentation which evidently satisfies your local PD
as well as your local DMV.
Your fender tag will resolve whether the Challenger was built as an auto or manual. Reading from left to right, the bottom line will have two three-character codes. The first three-character code indicates which engine, the second three-character code will indicate which transmission.
Although most on-line decoders are not 100% accurate, I like to use the reference area on MyMopar. Take it with a grain of salt as you would MapQuest (
) for instance and you'll come pretty close to knowing how the car was originally spec'd out.
http://www.mymopar.com/6971opcodes.htmDo a search here using keywords for threads relating to what is involved in an auto-to manual conversion or start your own thread. There is an awful lot of first-hand experience here and we're all willing to share. Best of luck x_cell.
Russ