Magnecore wires and injector holders o rings

[sammyg2]

After reading the input from this list, i ordered a set of magnecor 8.5 ignition wires, along with new injectors, injector holders, cap and rotor for my 80 SC.
These wires are impressive, even in the box. If they perform anywhere near as good as they look, I will probably pick up at least as much HP as I would with a K&N filter, split fire spark plugs and slick 50 all put together.

I even took tomorrow off so i can install all of this stuff.
The only thing I forgot to order was the O-rings that go around the injector holders. I have a large selelction of viton o-rings in my garage and figured I would have the right size. Nope.
Anyone have a clue as to what the correct size designation is, or do I have to run to the dealer tomorrow?