The early 4.7 PCV flow was too low to sweep moisture out of the cylinder heads which allowed “brown goo” to build up in the cooler section of the 4.7 head and valve cover.
This was one of the earliest complaints from 4.7 owners.

Perhaps the brown goo contaminated oil also prematurely worn out the hydraulic lifters, which have the tightest clearances in the engine and depend on clean oil of the right viscosity.

Poorly functioning hydraulic lifters and excessive slack could lead to popped off rockers and broken front post.

Replacing the hydraulic lifters might be considered for longevity.

If Chrysler added a cast in web brace to the front post perhaps an aftermarket metal brace could fabricated and brazed.