Also, the less flexible you are about the time of a particular FPP (i.e. only want to ride SDD in the evening, only want to ride PP first thing), the later in your trip you should have that particular day. If you look in the corner of the Dibb calendars, it shows an A if the earliest available FPP is afternoon, M if it’s morning, E if only Evening ones are available. If you need more detail, TouringPlans shows the actual available FPP windows but for a single FPP instead of 2 or 4. For instance, on October 8 at Magic Kingdom, these are the currently available FPP windows:
1:45pm‑2:45pm · 2:05pm‑3:05pm · 2:40pm‑3:40pm · 3:00pm‑4:00pm · 3:50pm‑4:50pm · 4:05pm‑5:05pm · 4:40pm‑5:40pm · 5:20pm‑6:00pm
You can edit that date in the URL to go directly to the dates of interest to you.
I used the Dibb link @PrincipalTinker posted and the Touring Plans FPP availability (navigating to the park and date of interest) to figure out what I could reasonably expect, including time of day and that changed what FPPs I targeted. Even on day 60+6 SDD was only available for afternoon/evening, so I made that a HS evening. Day 60+1 is a MK day for us and I knew ahead of time SDMT wouldn’t be available, and that the Peter Pan ride wasn’t available for FPPs until mid-day.