here's what i did (easy and obvious!)
where the WOT switch normally is wired in the system, i got a button shift knob (B&M gone in 60 seconds style baby!)
and wired it right in there. push button, and there it is. i have a MSD dis-4 ignition that i have a step retard wired in also. as soon as i push the button the ignition retards to my set amount. when i let off the button, the timing stays retarded for 1 second, then goes back to the stock timing curve. its a real sweet setup, as long as you can remember not to hit the button before your at WOT.