I bought a 68 Firebird in 2002. The car was never restored and it's a true numbers matching car with 2 build sheets found and registration cards from the original owner.
The car had the GTO shifter knob on top of the Hurst shifter. I thought it was a mistake but read somewhere the knobs may have been used in Firebirds.
How do you know it was a GTO shifter knob? they used some of the same parts like that, all dealers also sold them over the counter, knobs got changed like diapers some times, the round ball ones are all the same, the ones with logos are different.