I believe the only way to get a COR pin on that J6 connector is with some crafty modifying. I also read about using the audio trigger as a COR output. As far as changing the head goes, and I'm assuming you have the W3 HHCH, you would need the head you want to use, and the interface board for it. The...

T04KLH9PW7AN
Model W7 (146-174 MHz), 50-110 Watt, 255 Channels

Should be a 110w drawer unit that takes a remote mount W7 control head.

Following this as well, as I can't figure it out either..

Please forgive me if this is posted in the wrong section, but I couldn't find a section to put it in that seems to fit the need. I have a 45 watt maxtrac 300 (which I believe was originally a radius 45w). I think it may have been blanked and reinitialized as a Maxtrac300 High Sig. I plan on using it...