Reference Details
- Common issue
- Ordinary 1969 Mustang SportsRoof cars can carry Boss-style exterior parts without a documented KK/NASCAR identifier.
- Confidence
- reported
- Correct value
- Individual Boss 429 cars were assigned a KK/NASCAR production number
- Where to check
- Registry-style sources describe the identifier as associated with the car; auction records commonly list a KK serial number with VIN documentation.
