I just rebuilt my holley 750 4150 and i cant get the fuel to stop overflowing from both bowls. I adjusted the inlet needles down as far as i can and they still overflow.
Is it possible that i mixed the front and rear floats and caused this to happen?
I did noticed that the new needles looked a little different than the old ones but look the same length. I used a holley trick kit. My fuel pressure is 6lbs.