while I realize that any engine can fail even if it comes from a good "lineup" I have never had a 4.7,
I'm looking at a 06 1/2 ton with a good body and dead engine. looking at replacements, they sure are expensive for sure.... these aint no 318 or 360.... I know nothing about the 4.7s but I remember when they 1st came out they were considered "sludge monsters". also hear horror stories about valve seats falling out. Are these exceptions or rule with these engines?

how much of a PITA to swap to a 5.7? would rather have a 318/360 powered truck but the newest is 17 yo, and living in the rust belt... well, you know what that's like....