It is possible to only import and possess a skyline inside the US if you want to use it being a show automobile or race auto. You can’t register it till 2024, let alone push it on community streets.The RB25DE cylinder head within the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) may be used. The RB25DET (from your R33 Skyline or C34 Laurel