Congrats, Jimmy! You're good to go, holding like that - I've done it a lot when they get done quicker than expected. Sure better to get done early, and hold it, then take lots longer than expected and have to deal with hungry people because it's not done! Take it out of the smoker about an hour before dinner, and put it in a cooler to rest. The 140 hold will keep it "food safe," but it still needs to rest without heat.