360 la headers & straight pipe

This thread reminds me of Jay Leno story of his dad ordering a new car.
He checked off 7 Liter ( 428?) And muffler delete.
When his dad's car came in he was mad and said something like brand new car and hole in the muffler.
The sales guy said no see ya checked off muffler delete.
And Jay said guys at times pulled up we to to race his dad at lights.
At the time of the filming was building a tribute to his dad's old car.
Sure it is on YouTube aired long long ago.