Vette 89

I am just doing the optispark thing MY 93, and can't remember where this rubber o ring goes, I think it came from inside the cetre hole of the rotor. It is about 5/8 od x 1/2 id x 5/16 lg, had this thing on the bench for so long (no time) the brains gone dead. HELP
Thanks

grumpyvette

read these it may help
http://www.charm.net/~mchaney/optisprk/optisprk.htm
http://www.fierolt1.com/lt1_95_up_OptiReplace.htm
http://www.noid.org/~muttvette/opti.html
http://www.gulicks.com/vette/projects/opti/index.html
http://www.houston-f-body.org/tech/optispark/

Vette 89

I can't see any mention of the "o" ring / seal on those web pages
Anyone else rember seeing it ?????, I am pretty sure it came from the centre of the rotor, but like to varify I am correct.