I'm not sure what you are willing to give for a reman 5.2 block (which would still need finish honed to whatever pistons you were going to run?) But I would imagine pull a part up in Akron or youngstown would have a complete running condition 5.2 or 5.9 for a few hundred bucks, with a guarantee they would give you another if it turned out to be bad. That's me assuming you are doing something stock, or inexpensive, since not many focus on a 318. Not sure if thats the case