"crud coming out of the bottom outlets"? You said you had a boiled the block and had hot tanked the radiator two times. Where would sludge come from?
In 2020 you said “I do have about 6 head studs leaking coolant right now so I don't know if that's a factor or not.” On August 5th of this year you said you did not use stud sealer
https://www.fordbarn.com/forum/showt...315217&page=14 . Did you ever seal the leaks?
There is no doubt, you definitely need a bigger radiator.