Have you verified the current stretch on the old chain indicates the need? Many of the cars we buy have already had at least one chain change. We have no way usually of knowing that without records. Other than correctly checking the existing stretch.

If you are going to change the chain make sure you do not use one certain brand as it is inferior to others. You can research for the name ofthat brand or a member might post the name of the poor replacement chain from memory.

If by some chance you do pull the rockers on the valvetrain. Make sure you number them. They must all go back to the exact same place they were removed from. You probably knew that but just in case. Each rocker developes it's own individual wear profile with time.

Also important that you check the condition of the chain slider. Many times a new chain is rolled in with without it done. This slider can become the cause of a chain failure if in bad condition down the road.