This may be an ignition issue, but a couple more checks on the drivetrain should help confirm the problem. Try loading the engine as Roger mentions with the Ebrake on and the hood open so you can see if the engine is raising or twisting much. Does the clutch chatter heavily if you load the clutch quickly. (i.e. 'almost' dump the clutch with the ebrake on) If you load in reverse and then load in 1st is there a lot more slack than if your just loading from neutral? If you pull hard from 2nd gear at about 10 mph how many bounces till it smooths out? Is it worse if you try the same thing from 3rd gear? I just cleared up a low speed stutter that turned out to be wires that were only about 2 weeks old.
