How do you set the timing on 1987 d100 slant 6?

To set the timing on a 1987 Dodge D100 with a Slant 6 engine, first, ensure the engine is at operating temperature and turned off. Locate the timing marks on the crankshaft pulley and the timing tab on the engine block. Use a timing light to check the current timing by connecting it to the number one spark plug wire and aiming it at the timing marks while the engine is running. Adjust the timing by loosening the distributor hold-down bolt and rotating the distributor until the timing mark aligns with the specified degree for your engine, then retighten the bolt.