Hi, my Pontiac 428 800 double pumper spread-bore is leaking out the top castle looking post on the secondary. I was getting backfires until I filled up the primary bowl through the vent. It was running on the secondaries only I think. I took off the secondary bowl and cleaned it, but haven't started it yet. I took the secondary float out and shook it, it doesn't seem to have a leak. Any other ideas? Could that starve the primaries somehow? After I filled the primary bowl it ran great again, but had to sop up the leaking gas on the top of the secondary bowl. Thanks!