Agreed concerning the snake. But with such a long cook, I'll do these beef ribs on the WSM.A bit late on this one. However, I agree with @Bob Correll . Those ribs need time to render-to-tender.
I did a 4-Bone plate the other week and they took 7hrs.
On the kettle? The snake may well be the way to go, or the SnS packed to the gunwhales with briqs.
Edit: I see you don't have a SnS. Snake would have been the way to go.