@Boss Hog the 4.6 had a bad rep for slipped liners and cracked blocks. But it was down to 2 issues, they were run hotter for California emissions when sold they had a 190 thermostat and ran around 212-215F - (244F is the overheat light) any cooling issue tended to create overheating, which resulted in head gasket issues. And the lore is the engines were not as well quality checked, no way to know if that is true, but the castings are rougher with less cleanup done.
Every time one ticks the 1st response on internet forums in slipped liners, because they know nothing about pushrod V8's they all tick eventually, even iron blocks. Mostly it is the rockers from bad oil change intervals, or poor grades/quality of of oil and exhaust leaks.
I have an 04 with a 4.6 did head gaskets, a minor crack due to a poor job done by someone else prior, about 3 years ago still runs like a top, about 290000KM or 180000 miles on her.