Side clearence them .015, make sure they r centered to the valve, to start. Then to adjust....loosen lock nut one at a time and with Allen wrench set on adjuster and feeler gauge between rocker and valve tip...have a friend crank motor over while putting a lil clockwise attention on the wrench till it doesn't wanna freely tighten any more , then with valve held open...tighten lock nut and move to the next . That's for solid cams.
If hydraulic...just turn it to the back side of the cam lobe , loosen lock nut and turn counter clockwise the adjuster till u get free play on the rocker, then tighten just ill u have none...then turn the adjuster clockwise another half turn maybe 3/4 turn and then tighten lock nut.