I was using a craftsman torque wrench I use sometimes for my road bike.
http://www.sears.com/shc/s/p_10153_1...u=00944978000P Again this was a valve cover bolt that stripped, not a spark plug. Though I normally don't use a torque wrench for spark plugs as well but I did this time as I don't normally strip bolts either.
I really wish I had stopped sooner as there seemed to be plenty of resistance at 7.5 ft/lbs but it was the first bolt and I had 10 ft/lbs in my head.