13’ transmission just went out…time to Coyote swap, advice?

I’m looking to swap my ‘13 3.7 for a Gen 3 Coyote or Gen 4 Coyote. Fitment issues? Reputable sellers? What to look out for?

I know I need to get: Engine, trans, ECU, Wiring harness and that should be it? Do I need to upgrade anything else to handle the load?

I saw Gen 4 was in 24’ mustangs so parts availability is high but prices are probably up too

I’m new to this as I inherited a 240k mile mustang and want to upgrade it so any advice is helpful

Godzilla swap??? /s