Well, it's my turn to ask for suggestions..

thanks for the input. I do have a timing light. I cannot tell you the cam, because it was in the motor when I bought it (i stated that earlier). It is marked H260. It idles fairly mild. Not as radical as, per say, a .474/280 MP cam. I'm leaning towards 67Dart273 in the idea that I have a cam problem. Could be I lost a couple of lobes, could be valve timing, or just a bum-grind. This is where I will start. I will follow up my findings. I will start by checking rocker movement. If that's good, I'll look deeper at the cam/timing. I may just put a XE268 in it so I know what is in there.