well i have several coolant leaks coming from my well designed NPI intake manifold so its right about that time for a change. so i have a 2002 intake manifold all the parts involved but the only thing im missing is the tapped hole for the extra sensor. does anyone know how to do this correctly?

also i plan on doing this swap myself and wanted to know if anyone has done it and the difficulty level on it. im pretty handy but my only concern was the water pump nipple change and the rtv use. i kinda unsure about the exact locations your supposed to use it. i know that the channels are boot shaped on the npi heads and on the PI intake manifold they are square. that much i get but do i use it anywhere else. and does anyone else have any helpful hints?