The car rolled off the assembly lines with a 440 Six Pack V8 engine, and the production numbers indicate you won't find too many Chargers with the same goodies under the hood.
Dodge produced over 9,500 Charger R/T units for this model year, and while the rarest was the Hemi-powered example with 112 examples, the Six Pack version wasn't very common either. Only 684 units left the factory with a Six Pack engine, and 346 used a manual transmission.
While all these numbers suggest this Charger R/T is incredibly rare (especially considering that it's unclear how many of these 346 Chargers are still around), we know almost nothing about the car. The images posted on eBay by seller sanfre-45 indicate it's been sitting in a carport for a long time, so you should probably expect the typical rust suspects and metal problems.
The floors and the trunk could be wrecked, with surface rust already making its way to the body. The buyer must put the car on a lift and thoroughly inspect every inch of metal to determine its condition, as there's a huge difference between a rust bucket and a doable project. The seats seem in good shape, and the dashboard doesn't look cut.
The shared images aren't great, either. I can't tell if any parts are missing, mainly because the interior shot is blurry, but overall, the Charger looks complete. The paint is likely original, but it's hard to tell this for sure without additional information.
The engine under the hood is as mysterious as the rest of the car. It's impossible to tell if the Six Pack was still there, but the selling price suggests it is. The owner won't let the car go unless someone pays $33,000, and you can't expect a Charger R/T to sell for this amount of money without a rare engine under the hood.
The Six Pack joined the Charger lineup in 1970 and served as the second most powerful choice for R/T buyers. The Hemi was the icing on the cake, but the Six Pack developed 390 horsepower for a thrilling ride virtually anywhere.
It's impossible to tell if the car starts and drives, or at least if it rolls freely to get on a trailer, but you can see it in person in Harwinton, Connecticut. Everything points to a rare collectible whose place is in a collector's garage, so fingers crossed for this Six Pack to get back to the road sooner rather than later.