I'm feed up. Time to ask for help!

My issue is a loss of power. First off let me give you my build.

360 .30 over
Eddie aluminum heads
Mopar .484 cam and lifters
Speed pro flat tops
Edelbrock performer rpm intake
Holley 750 carb
Mopar electronic ignition
Cheap 3000 rpm converter
3:55 gears
26 inch tall slick

15 initial timing
35 advanced at 2500

I first noticed it on my first trip to the track with my new motor. The car started cutting out real bad at about the 1000 foot mark. I assumed it was ignition related so I changed the plugs wires and rotor. This helped a very little bit. I took the car out and noticed it is still stumbling if i am cruising at about 35 and floor it. Stumbling to the point of complete silence. So I get back and think it's the fuel pump so I throw a guage on it. I am getting 6.5 lbs until I get to high rpm then it drops to 6 which isn't a big deal. I then switch to my edelbrock 650 avs thinking maybe it's the carb. The problem was still there. I wanted to make sure the car launched fine so I took it out one last time and did a fairly high launch...tach wasn't working so no idea what rpm I let off the brake. The car accelerated great up until 50 mph and then I could feel it loose some power but no stumbling or hesitation. At this point I am about to take my dad's carb off his car and put it on mine because I have no idea what else it could be. Just for laughs here is my time slips from when the car was cutting out.[/URL][/IMG]

Thank you in advance for the help and sorry for the ignorance.