I tracked this one down too..
Seven Little Girls (Sitting In The Back Seat)
by Paul Evans & The Curls
Seven little girls, sitting in the backseat,
Kissing and a-hugging with Fred,
I said "Hey, would one of you come up and sit beside me?"
And this is what the seven girls said:
"Keep your mind on your driving, keep your hands on the wheel,
Keep your snoopy eyes on the road ahead,
We're having fun, sitting in the backseat,
Kissing and a-hugging with Fred!"
Drove through the town, drove through the country,
Showed them how a motor could go,
I said, "Would one of you like to see my dual carbureator?"
And the seven girls whispered low...
And as for "409" Beach boys, of course.
Here is a page with some muscle car songs..