Early vs Late 3v Crank Pulley Differences?

Tylinol said
Interesting, so no alignment issues with using the March 3 groove? Is there pulley listed for '69 and earlier or '70 and later engines?

I think it is for 70 and up
I did also have to realign the power steering pump to make it work
So far have driven the car approx 1000 miles no issues.
I post a couple pic's later