I see what Smokey is saying, he wants to know if you can plug up the hole the radio would leave if you had to remove it. The answer to that would be no, because without being in the No Wall or Super Stock classes you can't remove the radio from the dash.
Like Slate said though, if anyone was going to come close to a 155 they'd already know for sure. Also, a 155 doesn't come easy, or cheap. To get to that level chances are you'll already be in the No Wall class where you're allowed to have a radio outside the vehicle. If your in any of the Super Stock classes you can remove the radio from the dash, it'll be up to you if you use that radio for burps, or just buy a better radio and use that one.
This will be something everyone needs to address on their own too, because dB Drags won't allow you inside the vehicle over 140 db, and TNESPL has a150 db limit. So be ready for the 2010 season, because rules will be followed. If anyone hits higher than the limit on their first run, then their score will be capped at that limit. So if you hit a 142 in Drags then your score will say 140.0 and you will have to step outside the vehicle for any additional runs.