Adjust Timing with Timing Light and Reassemble Air Cleaner

What happens here

The presenter starts the engine and uses the digital timing light to observe the illuminated timing marks on the harmonic balancer. He carefully rotates the loosened distributor until the 12-degree advanced mark aligns with the timing tab on the engine block. Once the desired timing is achieved, he tightens the distributor hold-down bolt. He then reattaches the oil breather hose, secures the K&N air cleaner assembly, and replaces the decorative Chevrolet bowtie on top.

Goal: Set the ignition timing to the optimal advanced setting and restore the engine bay components.