1970 duster clone. need opinions.

well you have pics that are on the edge of everything you needed to see. i "looks" like this is an 8 3/4 rear from what i can see. trunk looks ok from what i can see of it. frame rails look pretty good. what little floor i can see looks ok. really need better pics to really tell anything more. get it on a lift or jack it up and snap some more pics if you can. also check the vin number out for the letters and number i mentioned. snap a pic of the fendertag too. while it is jacked up look on the side if the block for those numbers i mentioned ending with 318, 340, or 360. post back when you get this. also where the drive shaft connects to the rear. there will be a number on the drivers side. it will be either 741, 742 ,489. these will indicate what type of rear is in the car if it is an 8 3/4. good luck