I just went out and stuck a paper clip end into the opening. It did not travel very for sure, not past nearly at all where you can see the gasket on the pump. I'd say the pin is there.
I will keep an eye out on it, don't know how I caught it in the first place at this point but I know it does it off and on on cold starts when the car has been sitting for weeks. It has been a month since I last started it until last night. It popped out a few bubbles for a bit then stopped. Perhaps a defect in that pin?
When I first saw this air bubble leak I did check the bolts holding the WP on and did find they were LOOSE. I just sinched them down a little, firm.
They're only available for the small block right now, they're testing the market. You can get 'em with a cheese filled big end, the block will need clearancing tho
I would find a bolt that the same size as the hole. Cut it short so that it doesn't protrude and use some high quality epoxy. Or just pack it with plumbers epoxy.
I picked up some locktight here at work that I am told should hold it in place fine but if I have to take the screw out it will still come apart down the road.
