Spark plug wire management

Stock Magnum wire looms. Sorry, no pics right now- I'll see if I can get some next time I'm in the shop.
They press on over the studs that are used to hold the valve covers on instead of bolts.
Sorta like these:

I always grab a bunch (along with the studs) every time I go to the boneyard. Cheap and effective.
This thread also has some ideas for you:
Spark plug wire holder question?