Yup cabeza de res tacos is some good eats...if you’ve ever had beef cheeks you’re pretty much already there.
FWIW, yeah, beef cheek is the only part I am really interested in... If I could get that separate from a butcher, I'd be WAY a-head... okay I know bad pun...
Anyway, yes I know the concept weirds people out to no end. I grew up hunting, and helping family out doing farm work. A cows head isn't that much different than ribs or whatever....
My big issue is cow heads are huge. Yeah some sort of expander ring would likely be in order, although I think a 22.5" diameter should be fine. Veal would be better for fit...
I've seen guys do them in WSMs so I know it is doable...
Yeah, temp control is key. And making sure it is wrapped in moist banana leaves..
Maybe find a 22.5" dia tamale pot like they do with the 14" jobs making a mini WSM out of a Smokey Joe?