I agree that you're good on timing. Now, if you stuff yourself at Tusker House (and you probably will!) then I take no responsibility. That said, FoP is reasonably smooth its motion, not jerky. It just depends on how that stuff affects you. If you do feel sick, closing your eyes may help some, but the ride still moves, unlike Soarin'. If you want some time to digest, just plan to go closer to the end of your FP window.
Enjoy Tusker House. It's one of my favorite restaurants on property!