It’s my understanding that the priority is only relative to your dealer. Dealers can set a custom order between 10 and 19 (or something like that). So if your dealer has several orders and yours was 10 and mine was 19, Ford would try to build yours first all other things being equal.
For a...
Ford has a similar process. You should get an email with your VIN and scheduled build date a few weeks in advance. It’s my understanding that early production starts in mid April.
My guess is these are the optional wheels for the performance pack.
I base that on this description in the order guide:
19" X 9" (F) 19" X 9.5" (R) Machined with Tarnished Dark Aluminum (644) Available on GT Performance Package (67J)
Are these percentages just for the early production/allocation?
It looks like true “custom” orders are not being taken till April 17th with the build and price Phase 2. It would suck to loose out on my build if my local dealer will not take my order till 4/17.