so i bought this 81 k20 diesel. i took the paperwork in to non-op my new truck. as it turns out this truck hasnt been registered since 1997. the DMV said that i cannot even non-op my truck until i pay the $500 in back fees. i bought the entire truck for $800. it is definetly NOT a $1300 truck. furthermore, the DMV lady ran my VIN. the cab has already been swapped, and the VIN decodes to a 1/2ton 6 cylinder gas motor. so she said that the plates were for a diesel an the VIN was for a gas. in order for me to non-op it, i would have to pay the fees, AND prove that it was a diesel. there is no way that i can prove it is a diesel because it is already converted to gas. i dont just have a 6.2 liter lying around. what do you think i should do? my dad says its just another expensive learning mistake. he thinks i should part it out for whatever i can. any suggestions? thanks.