I'll give you what information I have. Ford changed their warranty pay out terms fairly recently. This makes it extremely hard for any dealer to be "mod friendly" as they now audit warranty work on a monthly basis and things that did not require prior approval do now (like a turbo). I live in SFL and my work involves them, so I will post the SFL stores that I am aware of. CFL hasn't had much luck with any mod friendly dealers.
Always REVERT TO STOCK (or as close as possible) when going to ANY dealer, you may be able to get away with lowering springs and suspension work if you aren't going for a suspension concern. Be especially sure to remove the following things:
-Accessports & their OBD cables. Uninstall & remove the cable, no matter how well you hide it in the dash, they will find it.
-BOV / boost reference items. Put your stock parts back in, any engine concern will be void if you have a BOV installed. Take out all added vacuum lines or boost gauges. They will try to deny based on this
-Stickers with your social media accounts / track day stickers. They will check this out.
Wayne Akers Ford - Lake Worth - Seem to be pretty good, as long as you have no visible engine mods
Al Packer Ford (both stores) - West Palm Beach - The west store can be more forgiving than the east store
Pompano Ford Lincoln - Pompano Beach - They are generally really good, Jeff is a great service writer, just make sure the car is stock engine wise
Autonation Ford - Margate - You need to make friends with a tech, or a service writer here. Again bring with no mods and play dumb.
Sawgrass Ford - Sunrise - Nope. Don't go here. They don't want our business
Pines Ford - Pembroke Pines- Same as above
Midway Ford - Miami - They used to be the best around, unfortunately their main tech left and no one has tried since so I'm not sure
Under absolutely no circumstance should you bring your car to either of the Greico Ford stores (Delray & Ft Lauderdale). They are both horrible, and will absolutely try to fuck you at every given moment.