Hemi Continues to quit at Speed.

Hey guy's I could use some help, My engine continues to shut down on the highway at speed. It' like shutting off the key, it just quits. Needless to say it's a little dangerous, plus not to mention, I don't trust it. It doesn't do it till after 1 hour of continuous driving at highway speeds (But can go as long as 2 hours). At first I thought it was fuel, but I already replace the pump, filter/reg unit, and insulated the fuel line.

I really think it is electrical, I have replaced the crank position sensor, added more insulation around the ECU, and put in a new set of plugs. I found a thread on the Charger forum where guy's are complaining that it is happening to their Chargers, but nobody has a fix. I'm contemplating a new ECU, but hate to drop the cash if it's not gonna fix the problem.

Any suggestions would be appreciated.:banghead: