Well I was able to mount 240zx Coilovers onto my 280zx after a few years of mucking about.
Mount Coilovers (front are direct fit rear req redrill)
Install 240sx front knuckles,
Install 240sx eBay ajustable lower control arms, (chyna, Megan, cusco)
**** you will need to sand down or grind off 1-2mm from the LCA heim joint to slide it into the Datsun subframe
**** you will need to order m14x1.5mm threaded rod to extend your tie rods and adjust for misalignment,
For the castor/traction bar, you will need a custom adapter! (Pic inc.)