How do you put distributor in time on a 283 Chevy?

To set the distributor timing on a 283 Chevy, first ensure the engine is at top dead center (TDC) on the compression stroke of the first cylinder (number one). With the timing mark aligned with the zero degree mark on the timing tab, remove the distributor cap and note the rotor's position; it should point to the number one cylinder terminal. Adjust the distributor by loosening the hold-down clamp and rotating it slightly, then recheck the timing mark as you do so. Once set, tighten the clamp and recheck the timing to ensure it remains accurate.