Difference between 70-71-72 dusters...

Alaskan_TA said
Almost everything, it's in the details & if a full list exists, I have not seen it yet.

For any 1970 model year car, there are many 'one year only' parts.

Different steering columns & the lockout parts which also affects the transmission linkage.

Different door lock parts.

Different electrical system components.

Those are a few examples. I am sure others can add more.

This is one of the reasons I stay within the 1970 model year for cars I buy now. It just makes it easier for me.

I didn't mention columns because it was already mentioned by Alaskan TA

on floor shift cars only: the 70 only column lock out was a bulky system that had many fail points as it wore. 71 and up made it simple by making the steering wheel lockout in the key only and was much simplified.

on column shifted cars, the basic principle for gear and steering wheel lock out was the same each year with the key locking the steering wheel and locking it in park on all years.