I asked for just a quote with a Sunday afternoon and been given it within the hour. That’s wonderful customer support! T.U. NMThe RB25DE cylinder head in the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) may be used. The RB25DET (through the R33 Skyline or C34 Laurel or Stagea) head is also used, having said that an external oil feed has to