G35c Coil over Q's
 

I just purchased a set of greddy type-s coil overs for a 350z. Now i dont have the instruction manual or anything as a reference when installing these. How do I know the height to set these on before installing? Any help would be great, thanks! also will i even be able to use 350z coils on my g35? from reading around it seems like alot of stuff is interchangable, but on the greddy site the 350z and g35 coil overs are slightly different

Set them to the same height in regards to the front coils and the same height for the rear. Drop the car and then take some measurements and redo :)

im just worried about the part numbers being different on the greddy site, it seems as if one set is longer than the other and i dont want to be bottoming out the coils or hitting the bump stops

The 350Z coilovers will be fine. I haven't checked, but there may be a slight difference in spring rates and/or valving rates. Check the sticky thread about springs and coilover specs at the top of the suspension section (this section).

Once the coilovers are on the car, then you can set them to whatever height you want.

this is from the greddy site, what is the difference between the 2?
350z front 10k- L 200mm / rear 8k- L 240mm
G35 - front 10k- L 220mm/ rear 8k- L230mm

I just want to make sure that i dont blow out the coils or something because im bottoming them out due to them being different lengths.