Hamtramck assigned VINs in groups of the same model.

3084xx to 3086ish - Barracuda models. 3086ish from there to 3088ish - Challenger models. After that the 308 range continues with Valiants & Dusters.

But, in real life regardless of VIN they were built inter-mixed & out of VIN order all the time.

I have a scan of one sheet from 308773, it is from the glove box, where was yours found, in a front seat back?