I believe AFR already uses heads from the Steven Sun foundry in China for some of their offerings.
They already make a few different Mopar castings, so it’s not surprising that AFR would explore the Mopar market by using what’s readily available.
Are you looking to upgrade from the speedmaster heads your currently running? Will these new heads allow you to run your current valvetrain parts? Any posted flow numbers for these heads and how do the compare to your current heads?