Where is the oil pressure sending unit on a 67 Dodge 318 small block?

The oil pressure sending unit on a 1967 Dodge 318 small block is located on the passenger side (right side) of the engine block, near the front. It's usually a relatively small unit with one or two wires connected to it. It's often near the distributor, but not always directly adjacent. You might need to look closely at the engine block in that general area to locate it.