If you gave me a wrecked Lincoln Continental, a gas V10 engine from a Ford F-250, and a pile of Mustang cylinder heads, it would still look like a pile of scraps after nearly three years of work ...

Furthermore, it appears the three spark plugs from that cylinder ... that Ford issued a Technical Service Bulletin (TSB) for the 2.7-liter EcoBoost of this era. Bad value guides in the heads ...