Attempting to remove the drain plug is not for the faint of heart on a Pantera. I'd say that if it has never been out since new, then it is a 50/50 proposition.
50% chance that you get it out. 50% chance that you damage the tank/and or wreck the plug.
The other thing is that even with a banjo fitting on it, it is susceptable to road hazards. With a plug in it, it's fine. With ANYTHING that is attached under it, that attachment is vulnerable.
Your call, but it isn't really for a novice to attempt. You DO NOT want to unleash Godzilla with an impact wrench to attack it.