I purchased the car already restored. The interior was originally from Classtique and I am sure will be acceptable to the vast majority. I happen to be very fortunate to live near Bill Sturm's shop and visit often. I had a long discussion about the interior as that has been his specialty for decades. Bear in mind he does fine point cars. He showed me samples of original leather that was used on the A400 and 68C as well as the artificial leather used on the door and kick panels, rumble area and side bolsters on the front seat. Originally the leather went through a two step process where the base leather was dyed and then a darker dye was applied after that "filled in" the recesses in the leather The final color was much darker than the current leather used. The leather also had a much more pronounced pattern.
The artificial leather also was much darker and was used on the door and kick panels, front seat side bolsters, and rumble area. In defense of the suppliers, it is very expensive to acquire the correct materials and colors and the average buyer would not pay what it would cost. I was thinking of dyeing the current materials a darker color to simulate the original but when all is said and done will most likely just live with the current set up. Almost no one will either care or know the difference. I just happen to like to stay as close to original as possible. That's just me. As an aside, if I were restoring a car myself I would probably stick with bedford cord which also is not always of the correct shade by the way. Sorry for the long winded replay. I am sure you will be happy with your choice.