7 Liter "Boss" Engine - Experimental
Dubbed '777"
Test engine under contract to Ford 

 

Specifications unknown, other than 7 liters in size. Believed to be a test version of the 6.2l SOHC engine built under contract by Roush in order to stress test the new Boss engine architecture.

Observations:

Note: there have been no announcements by Ford. Therefore, everything is tentative and unofficial.