You are running a 700r4 tranny. That cable is not a kickdown cable! It's TV cable and has to be adjusted right or you'll burn your tranny. This link will help: http://www.tvmadeez.com/article/index.php
I used Pete's circuit, works fine!
http://alteredz.com/Headlight_Relay_pg1.htm
http://home.comcast.net/~pparaska/image/electrical/Headlight_Relay_Diagram.jpg
Tim, what about your try-ys for Headman to check out? That would make a nice long tube, more ground clearance header for them to reproduce for us. Maybe you can get a cut, since it's your design!