I'm 99% sure that 280ZX brakes will not just bolt onto your B310's struts. The only 1% doubt is because I've never held them up to each other, but I suppose I could maybe this weekend check it out. Anyways, the entire 280ZX strut and brake assembly will bolt onto your B310's lower control arm/ball joint so you can just replace the whole strut...keep in mind though that you'll have to cut off the 280ZX spring mounts and possibly have to shorten the strut tube as well.