I am having problems with oil pressure, I have none.  I have a 1958 292 with a rotor pump,i rebuilt the pump and still had nothing, I snaked the oil passages with a cable and bought a Melling M42 gear style pump and it will not bolt up correctly.  Does anyone know what pumps will work, which is better rotor or gear, Why are rotor pumps so hard to find.  Any info would be great!

  Thanks in advance

       John