When was the last time you saw one of these (mystery race engine purchase)

I didn't ever get an opportunity to run a .509
The parts guy at the Dodge dealership I worked at basically told me I was a dumbass and pick another cam. I said after a couple days .474
He said that's too much for your 400 engine with a stock converter but it will work & it did but wasn't optimal
I never made enough money to do anything real cool with that car after buying the cragar version of drag lites and doing body work and painting it but it was the best 73 charger se I've seen yet.