I have 2 351W's with holley carbs in my boat. One runs fine, the other won't idle (dies). While running at a hi idle, fuel is dripping/spraying out of the main disgharge nozzels, and drips out at low idle, and dies. Looks like too hi float level or pump pressure or power valve leaking . Had carb apart twice today. First time everything looked ok, all passages open, float level ok. Reinstalled, no improvement. 2nd time I replaced power valve and needle & seat. Still no joy. Vac 13-15" at 700-1000 rpm, fuel pump pressure 8psi.
Any ideas?