Jdog,
I may be wrong about this and if so others will correct me, but I think the only thing the 66 427s had was a pcv valve. And I have seen one or two that didn't even have that so I don't know if they had to have them or not. Scrobac is pretty much up on that as he has a 66 so why don't you try e-mailing him?
Actually see his post on this thread at the very top of page 2
http://www.clubcobra.com/forums/show...411#post539411
Ron
