1970 Duster base model slant 6 rear differential 2070051 spider kit

Did any of the early Dusters w/slant 6 come with 5 on 4.5 lugs? Here is more of the story- mid 1980's I was building the '33 Dodge coupe. At work a man had an early Duster on the back of a large truck that he was taking to the crusher so I asked him to pull the rear end for my build because I knew the width was exactly right. It had a 5 on 4.5 pattern which was what I had on the front. I don't know the year exactly & I didn't see the engine so all I know about the rear end is the casting #2070051/ 9 bolt cover/ width drum to drum about 57.5"/ & 2.93 rear gear. It couldn't have been much newer than 1970 because in 1985 it was only about 15 yrs. old & wouldn't have been on this guys truck. It could have been late 60's but it was just an old car- it had never been "hopped up" so the wheel pattern had not been drilled into it- it appeared to come that way from the factory. So because I chose that rear end the current owner is pretty much stuck with it because of the width. Another rear axle would be nice to have. Randys says "The 9 bolt rear uses a different case & spider assy. which is NOT compatible w/new components. Motive double checked & he felt the spider assy. would fit. I'll know tomorrow when we try it. It was nice of CirclePilot to offer a complete assy. & I'm looking forward to his measurements. I appreciate all the feedback. A new cut to fit Ford 9"rear end w/driveshaft is over $3000 or more now & she just can't afford that right now. I'm retired & just trying to help get the car I built 30+ years ago back on the road. I was done until the spiders gave up the good fight! Thank you all. Joel