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The rest of the process is the same as with a pushrod engine. Find the exact TDC of the cylinder you’re measuring and record the No. 1 intake valve opening and closing degrees. Add the two numbers and divide that sum by 2 to determine the cam’s installed centerline. The stock cams are supposed to be installed on a 114-degree intake valve centerline. My cams were within 1 degree of spec and within 2 degrees of each other.