71 340 Duster

From my research it is a 4 speed car so that will go back in
As far as the gears whatever it came with but i haven't figured it out yet any help?
Correct me if i'm wrong 10" drums all 4 corners non power brakes
no Power steering
non A/C
Interior Black w/ grey insert split bench w/ fold down arm rest
8 3/4 rear end sure grip????

If the car is all original I'd just pull the center section and look on the ring gear, it will tell you what the ratio is. Also a quick check to see if it has a suregrip is to spin one wheel and if the other turns in the same direction, boom you got one. That being said just pull the center section and see one is there or not. By 71 it should have a cone type in it, if it has a clutch type in it then someone has been in it already at some point.