I plugged in your requirements into the wheel site for you.
I used OEM specs from here:
https://www.wheel-size.com/size/toyota/supra/2021/#trim-v-a90j29db-2019-2024-30i--382
Here are your results...
If you are dead set on those wheels (they do look cool!) then you could call up WeldCraft Wheels and see what they can do for you.
https://weldcraftwheels.com/
Car will be fine for three months, throw a battery tender on it.
Pump up the tires with air and have someone drive it to fill the gas tank and then throw some Stabil in it if you are really worried about it.
I let my Supra sit in the garage uncovered from like Nov until April or so - just sits...
No, they are not Illegal in Illinois (I think that is VA and D.C.), and even if they were I would still have it.
I didn't tint this car either for once - its already hard to see out of it as it is :)
I just always like to keep my line of sight on the road in front of me...and used to it from...
I was still blown away they released a 6 speed manual - I was sure they wouldn't do anything like that...even if it was an afterthought.....so who knows.
https://www.valentine1.com/v1-detectors/concealed-display/
From what I am seeing, I have two mounting points that wont really damage anything.
1) On the left side of the steering wheel, on the air vent. Any damage from sticky or physical mounting can be undone by buying another vent.
2) On the...
Exactly what I have said before on this forum and the goofy facebook forums. Supra owners are two worlds: 1) folks with disposable income and this is a toy/hobby 2) folks who really shouldn't have been approved for a loan in the first place.
I have been waiting a while as well until the Gen2 B58 CustomRom is out. The bootmod3 folks mentioned on this forum they could release the Supra customRom right now, but are trying to bundle in all gen2 B58 and B48 cars to avoid having different builds of the software and attempting to flush...
Your car has seen rpms higher than that I'm sure at the rollers they test at the factory, or the kid who moved it on the boat or off the boat or at the showroom while it was delivered :)