ok comp cams reccomends at least .080 for intake and .100 for exhaust at all times
here are comp cams directions
1. with degree wheel mounted to engine in correct TDC position, and valves adjusted to 0 lash, turn engine in normal direction until you come to 15 degrees BTDC overlap on your degree wheel, then set the tip of the dial indicator on the exhaust valve spring retainer, in line with the movement of the valve.
preload the dial indicator to about midpoint of travel, and set zero. depress the valve with your finger by pressing the valve end of rocker arm until exhaust valve contacts piston. make a note of the reading on the dial indicator, and record the clearance.
now continue turning engine in its normal direction of travel 2 degrees at a time, checking and recording clearances every 2 degrees until you reach top dead center on your degree wheel.
remember that since the valve will be moving, the dial indicator will not return to zero. you can either subtract the difference or reset the indicator back to zero each time before you make your clearance check.
move the indicator to the intake retainer and start checking the intake to piston clearance the same way you did exhaust, except begin at top dead center and continue to 15 degrees after top dead center.
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