Yet another new problem, Won't run when hot Options

[Ctrout]

Outside air temp has been around 90*F or so lately. When I start the car cold, it idles a bit rough at around 600-700 based on the dash tach and my ear. When it warms up, it comes up to about 900-950 and hunts very very slightly. Seems like it will idle like that indefinately. When I drive it cold for the first 10 minutes or less, it runs great. After that, it cuts out under light acceleration. Sometimes I can keep it running by pumping the gas, sometimes not. When it finally picks up RPMs, it pulls pretty well (as far as I can tell through the slipping clutch) then it bogs again slightly. Usually if I can get it to 20 MPH or faster, the momentum of the car will pull me through these moments of loss of power. I have the most trouble with this when I taking off from a stop. It also seems worst after I have driven the car a bit and then parked it for a half hour or less. CHT? Vacuum lines? Timing? Valves, Tune-up? Points? Grounds? Combination of any or all of the above? I'm out of money and running out of patience.