Wow, I have to be on Caddyman’s side, but you couldn’t be more wrong. I had a 2000 Grand Marquis, among others. It most certainly does have the sparkplugs down deep in wells in the valve covers. In fact, I had a 1999 Grand Marquis that had the intake manifold crack at the back where one of the heater hoses came out. It filled the #4 spark plug well with water and caused a misfire. I don’t recall ever seeing a 4.6L SOHC engine that didn’t have the plugs down in a well in the valve covers, but then I’ve only had close experience with the 1994, 1999, 2000, and 2004 engines.