First, I find calling this front disc upgrade 280zx confusing. Many are using 280zx front strut assemblies with vented rotors that come stock that way.
Second this upgrade adss only the thickness of the hat to the track width about 1/4" per side.
This link
http://community.ratsun.net/topic/242 ... 0-brake-upgrade-mklotz70/Is the one that Mike Klotz made the brackets. Dust shields weren't a consideration as the shield bolts on where the bracket bolts on. You could bolt them in between bracket and caliper.Knowing Datsun, proably a dust shield from an 80's datsun/nissan may work. Some models calipers were in front off the rotor, some in the rear, maybe able to switch them side to side to clear the caliper.
I have had mine on my 1200 coupe for almost 2 years and really like them-ALOT! I run 205/50-13 tires. Davec put them on his black 1200 coupe and he was impressed and a little suprised that the upgrade works that well. He runs 185/60-13's, an average size tire foot print.
240sx rear NON-ABS rotors 89-98 will work, the difference is .5mm shorter hat height. Sometime you can find this slotted, or cross drilled and slotted cheaper then earlier 200sx or Maxima,etc.