RC just emailed me back, for anyone looking in the future, they sell the spacers for $20 bucks. It's just a hair short of 1/2" (.456") Alternatively, you can just stack washers to allow the rails to sit.

Hey everyone. Not sure if anyone still lingers in the forums and I haven't been logged on in years.
The Z's been up and running for about 10k miles and keeping me busy during this pandemic. I had it remote tuned and not sure what she puts down as far as power but I'm very happy with it. My next main thing is to have the transmission to replaced, but aside from that I've been tackling minor issues and installed a catch can.
https://cimg9.ibsrv.net/gimg/my350z....60032a7e79.jpg
https://cimg3.ibsrv.net/gimg/my350z....ba2ae26ed8.jpg
https://cimg9.ibsrv.net/gimg/my350z....05c356fc90.jpg

https://cimg1.ibsrv.net/gimg/my350z....8ad5dec78c.jpg
https://cimg4.ibsrv.net/gimg/my350z....95fd09e4b1.jpg
https://cimg8.ibsrv.net/gimg/my350z....adf9fe50a2.jpg
https://cimg9.ibsrv.net/gimg/my350z....fb48c76a60.jpg
Dont mind the boost gauge, it wasnt hooked up.
https://cimg2.ibsrv.net/gimg/my350z....b6acf8f52f.jpg
https://cimg6.ibsrv.net/gimg/my350z....52b65d6378.jpg

I like the Forgestars!
Question: how is your catch can plumbing ran?

I have both the passenger and driver side pcv lines ran into the inlet and the outlet line runs to the turbo intake tube.