Put it the shifter on a vice clamping the ball not the metal. Heat up the ball with a torch or a heatgun. Give it a few good wacks, then let the ball cool down. I threw on some epoxy and made sure the ball stayed put (this wasn't nessicary but i did it anyway). Cut the rod to the desired height with a hack saw. Replaced the shifter bushing(might as well since ur already there). put it all back together. Put an after market knob on (since you won't have anymore threads most aftermarket knobs something to attach it to the shifter i.e. bushings w/small screw, or just a set of different threads)
i also cut the stock shiftboot because it was WAAAY too long after the install.
All in all I'm pleased with the outcome. If there werte something I'd do differently it's leaving a few inches on the height of the shifter. As it sits it's a bit notchy but still good.
I might eventually upgrade to something a bit more sturdy and less flexible than the stock shifter but for now it'll be fine.