V21 ,v24 on. 1971 duster 340

The V21 code on the fender tag is the flat black hood treatment WITHOUT the 340 callout decal, according to the official salesman pocket guide from 1971 (See the Hamtramck library website for more details).

Here is the link at that website to the 1971 salesman pocket guide showing codes with explanantions ---

https://www.hamtramck-historical.co...nsPocketGuides/1971/71_Duster_Valiant0007.jpg