Hi Sandcaster,
The oil pressure sender is in the passenger side, below the lifter side cover, around the place where the cilinder number 5 is.
Normally there is a dowel pin on the first and one in the last of the exhaust manifold holes. The studs or screws must be positioned in a way that allows the clamps that holds both manifolds to head to be placed according to the places that they atacches the manifolds.
As for the wires, You'll have to get a multimeter and check what/where they are for or from. What ignition are You using, an HEI, or any other aftermarket kit??


Alexandre Garcia