Little tapping when start up

[Sonyps307]

The motor is all new but the cams and crank they measured every thing they had all most no wear on them the first owner keep up with the oil changes and it has winsco pistons 20 over and eagle h-beam rods and a metal head gasket and balanced everything the motor has about 1000 miles on it the tapping started about 300-400 miles after the build Nothing is worn out they torque to 58lbs and not 70lbs im think that the head bolt came looser and now the headgasket is slapping between the head and block and when it warms up everything is expending and making less slapping