yes i have the disc set from mb- we used one of the diagrams to get where we are but one of them looks like it goes to a hole on top of the back of the manifold and there is not a hole to put it in- i will look again at it again this after noon. thanks again for all the info- and i am very careful about the mix- havent messed with it yet- will check it all out and let you guys know. thanks for all the info!