Going to look at a motor,hopefully Monday.A guy at work father in law apparently bought this new around 1970 and is still in the crate.He knows nothing about cars,but swears it has sparkplug holes in the valve covers.I talked to the son who has it in a barn,and has never paid attention to it,and thought it might be a 318.What are the chances this motor will be okay after 35 years?And if it is a 318,is it worth anything?