Anyone ever tried a Lock Right diff in a D 60?

Looking at replacing my worn out spers in my dana 60 with a lock right diff from Richond.Anyone have any experiance with these? Pros and cons. Going in 3/4 ton 4wd i haul my car to strip with as well as off road playing. Motors a mild 360. Tall skinny mud tires and auto trans. No one ive talked to has any experiance with them