Spark plug wire sets

[rollinstone]

For my '97 Explorer AWD 5.0:

Amazon has two types that fit:

1. WR5777
2. WR5863 (slightly more expensive)

What's the difference?

 

[mr2fix2it]

one has a different shielding than the other due to the fact of headers or cast iron exhaust manifolds.

 

[rollinstone]

Thanks. Which would be the best one for my truck?

 

[Epyon969]

Ford lists them as such: WR5863 with a build date before 2-17-97
WR5777 with a build date after 2-17-97