i got a 350 bored 060 over and td it just started knockin a bit at first thought it was a lifter then it started squealin real bad amd its not the belt got good oil pressure and only ideas i got is clogged port hole or something with pump hopein it has nothing to do with the rings pr piston just lookin for some easier ideas before i tear into it

 

Take the belt off and listen for the knocking squealing sound first.

 

Did you try the last thread. did you try to take off the belt and tried to listen to the knowing sound.