Thats pretty scary mick. Ive had a few hairy moments in the same spot, I know exactly how you feel. I remember seeing a boat smashed up there 2 yrs ago on tv news, I think it was Nev Howard from memory, a very experienced seaway boatie.
I had the same fuel line problem, but the waters are much flatter up here in hervey bay. turned out to be a faulty bulb, but it took me months to track down, cos I changed tanks and lines and had a prob with the second setup, didnt open the breather properly. Anyway, in the checking of the connection to motor, I had forced the connection, and made a small chip in the plastic connector. The reason it runs OK at WOT, is cos the vacuum power of the engine overides the leak. The leaks only show up at low revs or idle.
Glad you got it sorted. The north wall is a very scary thing when the swell is pushing you towards it - certain sinking of the boat........I started giving it an extra 30-50m width after that. Never went close to it again unless it was very calm. PLenty of fish over the deep hole without needing to tangle with rocks.
Ive also performed one rescue in the seaway- at night. They were very glad to see me.
cheers
Andrew