I requested to get a quotation with a Sunday afternoon and been given it in the hour. That’s fantastic customer service! T.U. NMThe RB25DE cylinder head through the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) can be used. The RB25DET (in the R33 Skyline or C34 Laurel or Stagea) head is also used, even so an external oil feed should be fab