I'm more than happy With all the customer care. I haven't been given my engine however but up to now so great. thankyouThe RB25DE cylinder head from the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) is often used. The RB25DET (within the R33 Skyline or C34 Laurel or Stagea) head can be used, having said that an external oil feed has to be fab