The club in our area allows outlaw motors too, however with the Punisher I found you need to gear up about 3 teeth on the pinion more than the Monster Max. In addition you will get nickle and dimed on the Punisher if you want to unlock its full potential you need to upgrade to aluminum screws on both the can and timing plus an aluminum timing plate, combined these upgrades are supposed to add well over 500 RPM. I recently worked on a motor for a local who bought all these options and everyone thought he was running a mod motor, ha! I have since ordered the upgrade options myself, which I think will still be less expensive overall when compared to the price of the Specter.
No doubt someone will show up to the track soon with a Specter and I can't wait to compare results. It's worth pointing out that some folks found that they got faster lap times with ROAR approved motors, only because they had less torque they were able to hit the throttle harder in the chicanes and carry faster corner speed with a slower motor. Not everyone can handle the extra torque you get from a Punisher, and this is only compounded if you don't gear up to account for the extra torque. I would expect similar results with the Specter if I had to guess.