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

Thanks for posting this Garrett. 1970 340 with speedmaster CNC heads. LD340 intake and 650 brawler carb. It has Speed Pro 2332 pistons. The heads were milled .030. 8553 head gaskets Compression is 10.2-1. Cam is installed at 104. Comp ultra pro magnum rockers. Kim