The rear end if factory will be an 8 1/4 with most likely 3.21 gears and no sure grip
No way it has 3 thousand original miles the odometer has rolled at least once
Look at the metal tag bolted to the inner fender on driver side it will list most but not all options.
If you post a pic of it someone can decode it with a decoder for you
I would be very interested in a pic of it because by the looks of the underside of the decklid it is a factory JF1 car which is a rare one year only color.
My 73 340 car was JF1 but with white top and stripes:
http://www.forabodiesonly.com/mopar/showthread.php?t=217020
