Its not possible, that's why I told you to call. Enjoy your Area51 Bronco, or cancel with your dealer and reorder, but be prepared to take a late 22 model
Do what makes you happy and what you can afford. There's plenty of articles and post's comparing the ups and downs of both engines do a little reading and make a choice.
Switched to a BL from WT, but kept the same features, LUX,2.7,Squatch,MIC. The change wasnt due to constraints but due to wanting the SBD and RC goat mode.
To infinity and beyond!