Has anyone fitted 20" 488 wheels on a 360?
I don't know, but someone fitted 458 wheels on a F355 (same bolt patern issue): Image Unavailable, Please Login https://bringatrailer.com/listing/1995-ferrari-f355-spider/
It would be more effort than it is worth unfortunately due to the different bolt pattern imho Sent from my toilet using FerrariChat.com mobile app
Paul Hill said he would not recommend adapters due to not enough metal left on the outside of the larger bolt pattern.
With all due respect, H&R has been making adapters for a long, long time. 15 years ago I tracked a 911 Turbo for 5 years with adapters using BMW wheels. Never had a problem.
Adapters are not really the problem: machined wheels to change ET is the real problem. I wouldn't fit some shaved wheels on my car (maybe a couple mm removed is OK, but not +1cm off).