1966 Pontiac 2+2 survivor with matching numbers 421 and 4-speed

The color is original with a very old repaint from decades ago. The body is straight and 99% rust free. There's a quarter sized rust blister on the rear bottom of drivers side fender and another 3" blister on the lower right rear quarter panel (see close-ups). The underside, frame, components are rust free and have not been blasted with undercoating (see pics). Vinyl top is original. Left rear quarter panel was replaced back in the day along with some light bondo work on the right quarter.
The engine is original to the car and was completely rebuilt back in the late 90's. Since then, I've only put on perhaps 1000 miles--running it back and forth to small local car shows. Runs and drives great--very smooth, strong, and sounds great. I wouldn't be afraid of driving it across the country. Doesn't burn nor leak any oil. After 8 months in heated storage, it starts right up with a few pumps on the throttle. Was originally a 4bbl car. I installed the Tri-Power, which is the correct one for the year and car. I do have the original factory intake and carb.
The interior is all original except for the carpet, which was replaced with factory correct carpet. A few of the front seat seams are split and the driver's cushion is flat. The dash has a large crack on the left side (see close-up).