i wonder if they are the same as the z32 discs, i know the calipers are the same exept the z32's are ally and a lot lighter, i had a z32 disc for an example, but the bloody scrap man took it with a lot of scrap off the back yard
, have you thought of anything to uprate the rear ? i read somewhere the other day about usind z31 rear arms, hubs, discs etc, as they use a vented disc on the rear.