Slant six idles rough

Ok guys I’ve done quite a few things since this post to cure the rough idle. Totally rebuilt the carb, set the float correctly, soaked, blew out, clean everything. I adjusted the valves fully warmed up, doesn’t make a sound now. Installed a brand new Petronix module, rotor, and magnetic sleeve, new plug wires, plugs are already new, new distributor cap. Verified pcv is working. It starts right up, doesn’t blow any black smoke anymore when cold, drives great going down the road. But, at idle, the engine shakes enough where you can see the hood shaking, or inside the car the seats shaking slightly. Maybe I’m just being too picky but I seem to remember on my last dart with a slant, it was buttery smooth. I guess the only thing at this point I Havnt changed in the fuel filter. I’ve tried timing at 0, 2, 5, 8, 10, 15 btdc and basically all the same. Any ideas or is a little shake from my slant totally normal?