4-Door with 340 from the factory?

oldkimmer said
In august of 1971 I seen a 71 duster 340 with a 6 pac/6 barrel. I assumed it was an add on. Don’t know where the car ended up. Kim

Didn't "Mr. Norm" make a few A-body 6 Pac's or 6 barrels? I believe it was 71' and not 70'.