Mine is after the prop valve, and I thought this was the correct way to install it according to the rules. I installed it according to a thread last year that had a link to a pic (no longer exists), and everyone agreed that it was correct. I have the upgraded wheel cylinders in back and a mostly stock TR setup, so when I tap the brake to release the LL, it stops the wheels. Maybe I need more practice to roll out of the burnout, but it would be much easier to just hit the switch!