Possible Clues:

• Collector Pontiac
• It was 'really lookin' fine' in a 1964 pop hit
• Legendary muscle car revived in 2004
• Pontiac in a 1964 hit song
• Grand Tourismo, abbr.
• Muscle car of the '60s
• '60s sporty car
• Sporty car in a 1964 pop hit
• Car that 'beats the gassers and the rail jobs' in a 1964 hit
• Title Pontiac of song