I just went through this with a 1999 5.9 from an Dakota R/T. There were 135 kilometers on the motor.

Since the magnum came out of a R/T, I felt it got beat on regularly. The upper shell of the rod bearings were starting to show wear. Replacing them was easy, just take your time and don't knick the crank. Visually inspect and 'feel' the surfaces after cleaning things up. Use assembly lube, verify the fit visually and by feel. Use a good torque wrench that you trust. You can change 2 sets at a time. The pistons push into the bore easy, and you can get some sort of look at the bore finish (but not at the critical ring area). The cross hatching still looked good with very minor light scratching that the fingers could not feel.

The lower shell of the main looked good, the upper? I didn't care to lift the crank.

I made a baffle for the car oil pan, cut down the oil dip stick tube, and made sure it fit through the baffle.

The valve seals look like quality viton seals. The engine in general looked sludge free with a fair amount of coking.

I have MP valve covers for it and a crosswinds intake. I also added the timing chain tensioner.

If my computer program is as accurate about the engine output as it has been with other 'builds', this should be a very competent driver in my Challenger. There is no point in using a tired, mild 440 when the output of a healthy magnum is about par in torque and hp. The program shows mid 12's possible, so a high 12 to low 13 is fine with me as a driver.