Very early 1970 Challenger fender RT was pin on and quickly went to stick on.
That is absolutely not true!
I have a 1970 Challenger R/T 440 SIXPACK N96 car with V9X which means it gets the R/T metal badges with 2 pins.
The car is ALL original metal and mostly original paint. It has an SPD of 723 (7/23/1970) so it's hard to get much later than that and since it is a Shaker car the chances are there was no way it was built super early.
The original badges, which are still on it, are held on with acorn (pal) nuts.