Guitar Jones pretty much covered it! If he wants to use the Ramcharger transmission, he will need to use the flex plate that is on the 5.9 Magnum. If the Ramcharger currently has a 360, he will have to knock the weights off the converter, or swap it out to a neutral balance converter. He will need to oblong one hole on the 5.9 flex plate to make the 727 converter bolt up.