A12 Engine 1985 Datto. R,S & B method of removing carby, manifolds & head for head gasket change. Failed to take note of the emission control plumbing/routing. Does anyone have a photo or diagram of this system. My manual (1967 to 1974) does not cover the gear on this model. Has solenoid mounted on front and rear of intake manifold as well as throttle nudger stuff. Help!