[escape velocity]

here is the placement for the passengers fender pentastar.
measured a friends challenger and used these for mine
seems to be just about perfect

The placement looks correct. Somehow I recall it was lower (from my Dad's 1964 440 and 1965 Belvedere II). It was always kind of scuzzy because it was close to the splash zone. It would be interesting to get the measurements off a '70-'74 Challenger to see how close we are.
Where did you buy yours and how did you attach it?

I'll start with your measurements, when my BW finally comes in. I'm approaching week 9 of my order. Yes, the wait is unbearable.