what is the difference in ride height between the h-tech's for the G and the h-techs for the Z? I am very interested in buying these as well but would like to avoid having to purchase any other camber corrections parts at this time. Would a good alignment job fix the camber issue?

On a side note are there any springs that do not require any type of camber arms. etc?

 

I have the H-Techs for the G35. Judging by neffster's photos I think the ride height is very similar. There is very little adjustment for front camber so they do the best they can but unless you get a camber kit you are pretty much stuck with whatever you get. Whether or not you need a camber kit is up to you. Even with a mild drop like the H-Techs my front camber is at -1.2 and -1.1. It is within stock recommendations but right at the limit. The inside of my front tires wears much quicker than the the outside. I have no issues with the rears, the wear is fairly even at -1.7 and -1.8.