Hey,
2017 ZL1 w/ARC-8 ZLE fitment (makes 200+ whp over stock)
I know I'm going to run 305/30R19 on the fronts. Have you guys used 3mm or 5mm spacers?
In the rear I want to go with 345/30R19 to support the mods I have and get some use out of second gear again

, concerned with it fitment. Please comment if you have this size on ARC-8 out back and what it took to make it fit. I plan on driver side harness relocation and roller/heatgun treatment to flatten spot out.
Tire wise I'm considering:
- Michelin PSS (would prefer PS4S but they don't make a 345)
- Toyo R888R (concerned with noise but car is very noisy not sure it will matter)
- Michelin PS4S (if going with 325 rear)
- Nitto NT555RII (345 rears) NT555G2 (fronts)
Thoughts?