[Street_Racer]

ok it will drive normal but something under a load it acts as if it just going to die like it not getting fuel when i floor it it can run fine but then sometimes it will get up them rpms and just run out of fuel it has a 770 holly on it it a 454 what could be causing this i checked the two little fuel filters under the hood and there clean could it be the bag in the gas tank or the rubber fuel lines or mayb the carb idk just some guesses everything is basicly new on the car motorwise no real idea tho

 

[Xtreme70SS396]

Let's try to narrow down what you're saying.

Off-idle is OK
WOT is OK
Sometimes... when accelerating it will act like it's running out of fuel and bog/try to die?

My immediate guess is you need a higher number Power Valve, that you're making good vacuum but as you gradually step into the throttle the PV is opening too late to give the car the fuel it needs.

But without a little more info, it's just a guess after all - you could be running lean overall, exacerbating the problem. How do your plugs look? Did you check for vacuum leaks? Where is your timing set? Does it always happen at a certain rpm? Same gear or any gear?