Sorry, can't help, but I've thought of doing that too, is why I clicked on your topic. I'm a ham as well. Just wanted to make sure you've seen Toyota's 2-way radio install warning near very beginning of manual: ". . . could effect multi-port fuel injection system, throttle control, cruise control, ABS, SRS airbag system. . ." and others. Maybe it's just a Liability release for them. Hope you eventually get all that installed---sounds great. Good luck!