Welcome Jim. Heaters are not difficult. Mine has only one wire going to it. Be sure to test the core before you install it. Be sure the voltage is correct, you say yours is bone stock so you will need a 6 volt motor in your heater. Just a few bolts hold it in place and hook up the hoses.

If you need more info, do as Alvin suggests and go to the particular forum dealing with interiors or electrical if that is the concern.

I hope the truck arrives next week and have fun with it.

Leo