I recently did the grubscrews too, with mine i tapped them so they would tighten up when the head got even with the crank. they got tightened to 70 inch/lbs. In addition I also used loctite high temperature red. I believe Loctite 272 i will double check when i get home.
I messed one up and didnt torque it before the loctite setup and had to remove it, well i had to heat the crank up with a map torch to 300 deg F + to even budge it and even then it took a huge amount of effort to twist out, and thats without being torqued to the 70 inch/lbs.