Nice start. What year?
First suggestion - install a Blend Mount or something similar to hang your detector from the rearview mirror. Makes it much more inconspicuous and gives the antenna a better view at the same time. Just run a wire up from the fuse block along the pillar garnish and to the center of the headliner along the windshield. Almost no removal of parts is necessary. If you have the dimming mirror, you have access to switched power right at the mirror and can use mirror taps. Because it is an LT though I assume you do not. Mirror tap also makes a generic kit to run from the fuse panel if you prefer.
First suggestion - install a Blend Mount or something similar to hang your detector from the rearview mirror. Makes it much more inconspicuous and gives the antenna a better view at the same time. Just run a wire up from the fuse block along the pillar garnish and to the center of the headliner along the windshield. Almost no removal of parts is necessary. If you have the dimming mirror, you have access to switched power right at the mirror and can use mirror taps. Because it is an LT though I assume you do not. Mirror tap also makes a generic kit to run from the fuse panel if you prefer.