How do you set the timing on 1986 Delta 88?

To set the timing on a 1986 Delta 88, first ensure the engine is at operating temperature and then remove the vacuum advance hose from the distributor. Use a timing light to check the current timing by aiming it at the timing marks on the harmonic balancer. Adjust the distributor by rotating it slightly until the timing mark aligns with the specified degree for your engine, typically around 8-12 degrees BTDC. Finally, reattach the vacuum hose and recheck the timing to ensure it remains stable.