Ok, the whole scenario of Shaker hoods (N96) being replaced with T/A hoods (N94) is a myth.
Here is why....
The shaker hoods were not available for a time due to safety concerns, we all know that.
BUT, they were back in production before the T/A hood was released, so any car ordered with a shaker would have had a raisin bran (J54) hood installed, not the N94 hood.
The N94 hood was available once it was introduced as an option for any Challenger with a performance engine, this continued for the 1971 model year.
For 1971 Challengers with the N94 hood, I have seen only three so far.