How do you set valve timing on a 1977 Datsun 280z?

To set the valve timing on a 1977 Datsun 280Z, first ensure the engine is at Top Dead Center (TDC) on the compression stroke for cylinder one. Align the timing marks on the crankshaft and camshaft sprockets, ensuring the camshaft is properly positioned with the lobes facing away from the lifters. Adjust the timing chain tensioner and check the timing alignment with a timing light, making necessary adjustments to achieve the correct ignition timing as specified in the service manual. Finally, reassemble any components removed and ensure everything is securely fastened.