Offset is a huge part of the equation. If you don't know, then you can't really make an informed decision and it's tough to offer guidance. See if you can find out.
I'm going to echo what many others have already said. 10" is the sweet spot for a squared set up if you want to go wide. Since...
Assuming you have either of the non PP GT wheels, I wouldn't go wider than the 255/40s that are on there. Those rims are only 8.5" wide.
Edit: sorry for the redundant post Dave.
This has been a complaint going back to the new S550 in 2015. Selectable drive modes, steering, and the later active exhaust never save when you turn the car off.
You can however, use the custom button on the S650 for your preferred exhaust setting.
Actually all '64 1/2s were not titled as '65s. Most were, but there is documentation that shows some were titled as '64s. There was also a lot of Ford marketing referring to them as 64 1/2s . They were however all vin stamped as '65s.
Not arguing with you, just sharing a fun fact. We can go...
Well, the 2015s were badged 50th anniversary, and the 2025s are badged 60th anniversary.
EDIT:
weirdly the 2004s were badged 40th. So Ford hasn't been very consistent.
I used to absolutely hate Pirellis. I always found them very noisy, crappy in the rain and had short tread life.
But the new P zero versions are actually very highly rated. Even better than the factory Continental pro contacts. 🤷♂️🤞🏻