I've got an 86 Bronco XLT 351w w/ c6 auto. Recently bought a new head unit for it, Pioneer mvh-s310bt, and the only issue I'm having with it every now and then when I start the truck up, the head unit refuses to turn on, until I take off the radio trim bezel and fidangle around with the wiring harness behind. Only then does it sometimes power back up. Any input is appreciated. If you need any clarifying questions, ask away.