Very few 67 TCs had Dunlops, it’s more likely that the car is actually a 66 and just wasn’t registered until 67. That was the situation with one of the two cars I've had with Dunlops. The other car was a 66 SC. The 67 was a TC, and sadly I got rid of it before I was really knowledgable about the P6 as in hindsight I think it was a factory TC prototype that had been tested in the US and then sold.
Yours
Vern