can you please specify which skyline r33 discs you used please? as i was not able to find any 30mm thick - 290 mm diameter disks
the once i found are
NISSAN Skyline (R33) 2
This is a Vented 4 Stud Brake Disc
Brake Disc Dimensions
Diameter: 256mm
Height: 50mm
Thickness (new/min): 22/20mm...