Head Gasket Failure

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Written by {ga=Evans}

I am experiencing problems with rapid head gasket failure on my ZB Magnette. It has a standard 1500 B series which was rebuilt prior to my ownership. The head has been pressure tested, converted for Lead free, re-faced. The block has been checked for distortion and is level and true. When running the temp has been showing a little high, but oil pressure has been consistently good.  I have replaced the 'stat, checked the water pump. My last resort is to draw all of the cylinder head studs, check, clear /clean threads, and seatings to make sure they are well and truly home etc. I have adhered to tightening sequence torqueing up in 10ft./pd. increments up to specified torque figure. What am I missing or what else could it be?