well everyone that i tell about replacing my distributor is warning me not to put it on wrong, i was under the impression you couldnt mess it up now im getting nervious while my opti is being shipped to me (thx dal, good price $287 for non vented )

 

On a non-vented, just make sure you pay attention to where the "index" is on the splined drive and match them up. You should see something that looks like a tooth missing.