Triumphant,
If you're leary of pulling the slides out, as you need to if you're gonna drill them, then just get a lighter spring as mentioned above.
Another point to bring up is that this mod works the best if you have open exhaust and free flowing air, ie: freak, K&Ns and good pipes.
The spring route may be best if you're concerned about it. But remove the slide if you're gonna drill else you'll end up with crap in the carbs that will cause all sorts of trouble. Mr. Murphy guarantees this.
