I'm running 16x8 eet10 squared on my super. I'm also running the KW v2 coil overs front and rear. with my offset I don't have any issues with wheels hitting the springs. but i feel 16s do look best on a super IMO. and yes my fenders have been pulled and stretched.
https://photos.app.goo.gl/irRV1gRMEATq49Xp6