I'm new to the forum so if I am asking a question that has been asked and answered, just point me in the right direction. I have had lots of boats with mostly 305s or 350s in them. Now I am looking at a project with twin Mercruiser 470 engines. They purportedly have 600 hours on them. Are they worth using or are they better as an anchor? Need to know before I jump. Thanks in advance.