Damn it, I don't personally have the knowledge of the keydown rigs like your building, right? I just run small 1 or 2 pill amps and stock radios and get my SwR's down low as possible. But it sounds like you have a good game plan for what you want to do. The only reason why I run a glass whip is because its a top load antenna, so the coil is 3 feet above my cab. So it talks / receives very well. If I plan on running an external coil antenna the coil will need to be 6 to 8" above the roof line. None of my friends run them so I can't experiment with one.

Good luck buddy make sure to post pictures as the build shifts into gear. People like can me learn a lot from them. BREAKER BREAKA