I'd just like to toss my 2 cents in here. I cook a lot of pork belly. I use it for mac n cheese and beans. I cure them with pink salt and pork rub. With that said, I really don't think it's a good iidea to let that meat languish in what we call the "danger zone" anywhere between 41-135. It's not safe in that range for more than a couple hours. Any more than six, and you are just asking for food Bourne illnesses. Cured or not, cook pork belly at the regular bbq temp, or cold smoke if you can. Otherwise don't do it at all. Seriously, you could kill someone.