Not in my boat but instead a chrysler 400 in my 72 plymouth Satellite anyways I broke in my new rebuilt engine and I forgot to change the oil after initial break in first 30 minutes or so. I actualy drove it for a little while maybe 2oo miles or so, some hwy. I am thinking that the lobes on the cam are flattened, because of the lifters tapping, so that will have to be changed out. Is there anything else that this can damage? piston rings etc? big oops on my part, but how bad