You're dealing with people who weren't even alive when your truck was sold.
If you have a 5.0l EFI truck, it's the same for '85-86.
When I look that up on Rock Auto I get easily a dozen hits for trucks with EEC IV.
The difference being that a DS-II has a cylindrical coil, and the EFI has a square coil.
Some sets come with both styles of coil to distributor wires (10 wires total)
Here's a screenshot.
Personally I would go for either the NGK 52275 or the Standard Blue Streak 10011 wires, but at least you have choices! 💡
But the Standard 6900 will fit, and be 'premium' as well***
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.