WRONG
N23 wasn't on the tags until 1972 (STD equip on 340 cars) IIRC and NEVER on 1970 cars.
Been spending time at some of the sites with fender tag info that is WRONG I see. Maybe mymopar.com :)
LOL
If you want help looking in a 70-71 parts book, distributors are under 8-27-1. NOT A SINGLE non points distributor listed for EITHER year.