ok you with brake discs sat on the lounge floor , i need to decide what my rear discs are off, at 1st i though 2wd cosworth fronts, but not too sure now

no point in a pic as its the sizes that are important

O.D 283mm ( give or take a mm)
Th. 22mm
spigot ID 62mm ( +- a mm)

now ive got some 3dr fronts and the overall is the same but the ID is bigger by about 10mm

any ideas guys ?>

mark