Well not sure but a blade steak reminds me of a chuck, though i have fried, bbq'd so think slow is the how so agree (go figure) with The Bear.
Yup---These are easy to tell where they came from, as each slice has a crosscut of the shoulder "Blade" that pulls out when you make Pulled Pork from a Butt. You can see it easily in my last 2 Pictures above.
And Thanks for the Like.
Bear