I have a Perma-cool filter, which has the hole for a sensor, and if you don't use a sending unit, they supply a plug for it. You can install the sensor at a later time. The filter was around $38.00. The number is #10678 which doesn't come with a sensor or temp gauge. The #10677 comes with the sensor and temp gauge, but I don't know how much that one is. I got a different gauge and sensor. It is a Dakota Digital and you can go to the link and see what it looks like. It is around $ 100.00 for gauge and sensor. Thanks for the information on the ports.
http://www.dakotadigital.com/Detail....umber=ODY-08-3