V21 ,v24 on. 1971 duster 340

The V21 code --- means -- that the flat black hood --- WITHOUT - 340 callout decal - was available for both the VL29 VIN coded (either a /6 or 318 V8 equipped Duster) and VS29 VIN reserved for 340 Duster models.

The VL29 VIN was the basis for the 1971 Duster Twister model which was not available with and did not have the 340 engine.

Only the VS29 VIN Duster included the 340 engine.

The V24 code was reserved only for 340 Dusters (VS29 VIN) and therefore the 340 callout decal was included with the V24 code.

To summarize --- a customer could factory order a 1971 Duster Twister and a Duster 340 with a flat black hood treat using the V21 code for optional equipment from the factory.

The V24 code was applied only to 340 Dusters that included the flat black hood treatment and the 340 callout decal.

So a customer could factory order a 1971 Duster 340 WITH (code V24) or WITHOUT (code V21) the 340 callout hood decal.