Roger that! It's a 16.42lb ribeye and I'll be using my Traeger Lil Tex Elite at 225. It can have some higher temp swings, but hopefully it being colder here it stays about 220. Would one think 5-6 hours to smoke?
I never did one that big.
Make sure you preheat it real good, before you put that Beast in.
I almost always used Hickory, and kept it smoking as long as it was cooking.
One that big should only be about an hour longer "Total" than my 5 to 7 pounders.
Bear