Magnum balance....

Yeah, just to be safe, I would clean the area in the front of block right below the driver's side cylinder head(area behind the power steering pump). Depending on the year, it will either have the liter size (5.2 or 5.9) or the cubic inch size (318 or 360), along with other numbers that will tell you the year and other info.

5.9s should have a flexplate with a weight on it and a harmonic balancer that has a section missing out if it. 5.2s will have a flexplate with no weights and a balancer that isn't missing any section.