I just installed the Eibach kit/Tokico HP struts on my 78 280z. I have the same problem, suspension is now higher than stock. I have the springs installed with part numbers 6303.001 Front(shorter spring) and 6303.002 Rear(longer spring). I have installed springs with writing right side up and readable. The struts cannot be installed backwards as the spacer on the bottom of rear strut wouldn't fit in front I believe. I bought from Whitehead Performance and they told me where each spring should be installed even though its not clearly stated online and there is contradictory information. I did tighten everything up with car on stands but went back after and loosened/tightened suspension with each side jacked up as it would sit on the ground. I can't drive the car now to unbind suspension as it is undergoing a small resto, and we are in the middle of winter here in Canada. Hopefully some of the smart Z people on here can offer suggestions as I have scoured the Net looking for answers. From what I have seen others post on the Eibach/Tokico HP setup, their pictures of their Z look good, so something is definitely wrong with our setup. Sorry to hijack your thread, hopefully we can find some suggestions from the smart Z people on here as I have scoured the Net and found nothing.