help! truck still wont start

[texas69truck]

I posted up before when i ran out of gas and the truck wouldnt start up, i took everyones advice and no luck. its a 69 c-10 with a 92' 350 and holley 650 on top. Flushed gas out of the cylinders, changed oil, plugs, and wires and put new needle and seats plus a new power valve in it and it still wont run. it cranks but it seems like there is still to much raw gas being dumped in the engine?? anybody have any ideas of where i could have messed up or something that im over looking? any help is greatly appreciated.
Thanks, Travis