Howard's cam suggestion

Here’s this cam. It was a little small in this application but it’s got a nice idle. The heads may need worked to run the .506 lift, too, but it’s on a 104 ICL so it still makes good lower end.
Howards Cams Camshafts CHRYSLER 5.9L/360 Mopar small block LA - 0.506 int./0.506 exh. Valve Lift with Factory Rocker Arm Ratio