Here is an email response from Chris in regards to what I've asked above:
"Yes, a separately installed temp sender. DO NOT tap off or relocate the engine temp sensor. The car engine may have an allen plug on the front of the water cover you can use."
There is an allen key plug in the front of the water pump at the top of the engine. I believe its a 1/4". Luckily I had a sender and adapter that is the right thread for this with my speedhut gauges. Otherwise you will have to drill and tap one to suit. I will upload pics over the weekend.