Smoking a Chuck Roast

just don't cook it long enough to pull...IT of ~150° or so should be fine if you're going to cook it again for something like carne guisada or chili. I'd probably go higher if you're going to slice and serve...probably more in the 170° neighborhood

Braise it.
Sear in a hot skillet or over the coals then cook indirectly in a pan with some beef stock or apple juice or whatever you like.
It's good stuff.

I make something with chuck arm roasts I call a smoked Philly. I smoke the roast until 150 and then foil to 185-190 and I slice thin. I then serve in a seasoned beef broth and put on hoagie rolls with onions and provolone. So if you cook yours like you have read for chuck roasts but stop it at 185 or so and don't rest or pull it, it should become what you want.

Ive done chuck roast like prime rib where i cook in my water oven @ 132F for 24 hours then smoked for 4 hours @ 150 till it reached 140F IT. Was phenominal, just like a good smoked prime rib done medium.