318 cam suggestions

Are you dead set on using a hydraulic flat tappet? That is probably going to be one of the better shelf cams if upgrading converter and gears. If your compression is under 10:1, you could install it on a 99-101 ICL. Weird, that's the very cam I was about to recommend. Howards Cams, Rattler Hydraulic Flat Tappet Camshaft, Chrysler SB LA, 227/235 @ .050, .480/.488, 109 LS - Competition Products
Oh, what pistons did you install, as in compression height? Did you go with KB 167 or the like?