ignition breaking down

Once warmed up my car starts to break down under acceleration, it feels like something is cutting out. The ignition is all new FBO high output stuff. I cahnged the coil which worked well for about 10 mins before the problem reemerged. Since then ive changed the distributor and the ECU without any positive results. I even looked under the hood in the dark to see for electrical tracking, nuthin.
Any suggestions? Its getting me down.