Transmission TC/Flex Plate Cover

It should bolt right on. Magnum trucks and vans used a 518 or a 46RE, which is pretty much a 727 with an OD unit hanging on it. Same thing applies to an A500 which is based off the 904 style case. The bellhousing flange on a 5.2 or 5.9 is the same as 318/340/360.