Keeping things safe in a rollover crash is a multi-point roll cage. The rest of the interior is lined in what appears to be stainless steel, with the exception of the factory dashboard. However, where the gauges, climate control, and other dashboard-mounted controls would be are sheets of stainless steel.
Just like the exterior, the interior is 100 percent un-restored and in its original racing condition.
Owning any car driven by the legendary Junior Johnson is awesome, but the rest all pale in comparison to this Impala SS. And the reason they do not compare is because of what is under that hood, the “Mystery Motor.” As we stated the Mystery Motor isn’t so much a mystery, as we know it is a limited production Mk II 427 cubic-inch V-8.
This truly is a `tweener engine, as it features the same bore spacing – the distance between the centermost point of on cylinder to the next – as the Mk I 348/409, but has the same 4.31-inch bore and 3.65-inch stroke as the Z11 427 cubic-inch engine found in production 1963 Impalas. On top of all of that, the Mystery Motor features the same two-plane cylinder heads found on the “Porcupine” engines, the Mk IV engine. It really appears as if the MkII was Chevy’s own guinea pig engine.
All of this and a little bit of tuning pumped the 427 cubic-inch V-8 engine to a massive 600 to 650 horsepower, a full 173 to 223 horsepower more than the 427 was rated. This is what many people attributed Johnson’s 1963 success to, but they later found that his was a pretty good driver too. Back in `63 many racers often assumed Junior Johnson would either take 1st place or retire before the end, due to engine failure, as there were very few cars, if any, that could hang with the Impala’s 165 mph top speed.
The engine is about as original as possible, even the shiny valve cover paint is in its original racing condition. There are only two components that were replaced in this engine’s life; those are the alternator due to failure and the carburetor due to theft.
Backing up the Mystery Motor is a four-speed manual transmission. There is little mention of what transmission it is, but we venture to say it is the same transmission that came with the 1963 Impala SS.
Overall, the engine is a thing of beauty. The most impressive feat is 600 to 650 horsepower in a 1963 V-8 without modern day modifications. That is simply amazing and a tribute to what NASCAR once was.
Suspension and Braking
Unfortunately, there is no information given on the suspension and braking systems, but we would assume it to have the standard Impala SS suspension and brakes with some slight modifications.
Price
This car is classified as a “Private Collection” in RK Motors Charlotte’s inventory system, so they do not list a price for it. A high end Impala SS with the 409 and a four-speed fetches about $62,725, but with the rarity and story behind this car, you can expect at least three times that value. We would venture to say that RK Motors Charlotte would part ways with this Impala for roughly $200,000.
Competition
This car was driven by a Hall of Fame NASCAR driver and one of its all-time legends, and it features the storied Mystery Motor. There is no such car that could compete with this one-of-a-kind car.
Conclusion
We absolutely love classic racecars and classic NASCAR stockcars really hold a special spot in our hearts. This was a time when NASCAR was a natural sport without its corporate mumbo jumbo, restrictor plates, and level playing field. It was a sport of who can build the biggest and baddest car within our limitations. This made it a sport of both science and skill, making it extremely intriguing.
This is a legend of that era, despite running only one season, and it is in its original racing condition. What is there not to like about it? Oh yeah, the undisclosed pricing. We assume that RK Motors is leaving off the pricing to see what exactly people are willing to give for it.
If you have an extra $200K lying around, we suggest offering it to the folks over at RK Motors. We bet they will hand over the keys and title to this legendary machine.