The front of the oil pan is where I always put them. It's easy to get to and just as thick as the rest of the pan. I can text you some pics of the location to drill and tap If you want.
That spot will most likely interfere with tranny lines in the truck. With it out of the truck it is a breeze to go into front of the pan. Get it ad close to the lower part of your balancer and it will return above oil level. It would come just above the windage tray inside the engine.