351c knock

my cleveland has started to knock. and i was planning a rebuild anyway. so does anyone know about how much i should set aside for this. ive done research and ive found one that out matches the others. for $605 i can have replacement gaskets, head assemblies, short block assembly (thats all the bottom end stuff except fot the crank). but im wondering more about machining, i know the cleveland has thin walls and removing any more then .035... im getting into streetability reduction issues. i know i want the heads and block baked, or bathed. and the heads professionally rebuilt< that way i can blame them if something fails. does anyone know how much that could cost?