Ok, so this thread is a bit confusing! But, hopefully I can clear it up somewhat.
In your case, you want a flush concave wheel setup. In order for you to get a concave face wheel installed, then you NEED to uninstall the spacers you currently have. Since if you leave them on, the new wheels you purchase need to have a high offset to compensate, which in turn, leads to a flat faced wheel.
Most popular 18" size wheels for flush concave 370Z are going to be this:
18x9.5 +12 ~ +22 Front
18x10.5 +12 ~ +22 OR 18x11.0 +15 ~ +20
There are a lot of different variations, but this seems to be the standard without any work to the fenders (i.e. rolling / pulling). But, again. Those sizes you can run, but WITHOUT spacers.
Check this 370Z out. Sitting on Enkei RS05-RR 18x9.5 +22 Front / 18x11.0 +16 Rear
Is this the type of setup you are looking at?
