Spare usually run me about 5 hours running 225-250 range. I do a 3-1-1 method. 3 hour smoke, 1hr foiled, 1hr no foil then sauced. Come out perfect to my standards.
With no foil, just cook at your desired temp, again I like 225-250 for ribs, until they probe tender between the bones with a tooth pick. That will still run you 4-5 hours.
I let mine rest for about 15 minutes.
18.5" OTS, 22.5" OTG, CB Silver(Rip), Vintage Coleman Bullet, Pit Barrel, UDS