Elderbrock air gap intake question

You have ports in the back near the firewall? Mine only has a couple in the front. If you do, you are going to want to use the ports in the front, that is the most accurate spot for temp as the thermostat is in the same area. Although if you are using it for an adjustable temp sensor for a fan, through trial and error you could get it set at the temp you want it to come on and shut off.