Replaced (4) SP last weekend; a "20 minute job" once I find all my tools (not a 20 minute job) Probably original from factory; bought the car @ 65K
The rusty collared one is cylinder #1.
I love these newer cars with easy tuneups, No getting my hands hacked up trying to adjust the dwell on a 350 buick with an allen wrench and the fan spinning.
I used to be a V8 guy but having spent 3 hours trying to replace a passenger side SP on a 87 Caprice for 3 hours, I decided this wasn't for me anymore.
Sold the car to a guy @ work and told him I hadn't replaced it, and he laughed it off, until there was no smile on his face monday morning.
Respectfully submitted for your adoration or commentary.