1970 340 Duster rare x car.

Fact of the matter is, with no build sheet and no fender tag, it could have a factory installed "Adult Hemi" in it and it wouldn't matter. It's a nice 340 Duster builder, nothing more in my honest opinion. To claim any sort of "special" status that will stick with the car, you need actual documentation pertaining to that car. I once heard of a girl who could deepthroat a 7-11 Bigstick popsicle without getting a Icee headache. It was just a nice fantasy until I actually saw her do it.