Maybe, but considering the recess of the plug, there is good chance of slipping off and putting a really good gouge in the threads. It's not like the plug is going to be preserved, so drilling won't be spoiling anything. So, just for fun, I have US$5.00 to wager with any one (and only one) taker that the punch-for-torque method doesn't work in this case. Anyone interested? Winner (I mean "I", that is) would be paid by PayPal. Of course, TimK would have to try it and report the results.
Richard L.