How many miles before you replace the coil pack

[Chef Nails]

As a part of regular maintenance? My Ranger is just above 200,000 on the ticker and I doubt the coil pack has ever been reaplced. Since i'm doing a tune up soon anyway, I was thinking it might be a good time to replace the coil pack. Any good input?

 

[Hooligan]

It really isnt but it doesn hurt to replace them. If it were mine, I would replace it every 100k