As the factory type wasn't ever installed
After reading the problems associated with try to do it. Looking for the next best suggestion. A Kat's freeze plug or a lower radiator? What are your thoughts please?. As it routinely gets down to 0°F here in the winter and she's a bitch to start at even 35°.
I crawled under there and looked yesterday and it's actually quite accessible since the truck has a 3 inch body lift so I can get take a right front tire wheel off and get a straight shot at and I won't have to pull the manifold all the forums I was reading everybody was saying was going to have to pull the manifold that's what I was trying to avoid
Throw a factory block heater in it and it'll probably last you 20+ years. Pelicanparts has them.