Help with Borg Warner C400

[96Z28SS]

As anyone installed the Opti-spark
that is a Borg Warner C400. The instructins show to O-rings that
look like they go inside the Rotor.

However, the old (OEM) Opti-spark does
not have this O-rings. And where the
rotor goes there is no place for them.

I have a 96 Z28 SS.

Can anyone help?


thanks

ed