oil pressure problem

[daisyak9]

This is the ports I was using.
http://www.440source.com/bellearly.jpg
My oil pressure fell off to zero, neither port has any flow or pressure?
66 383, I don't really know Mopar engine specifics, the research I've done led me to possibly a spun cam bearing? The engine has less than 5K since rebuild? Runs with no notable knock or lifter clatter. Help?

 

[Purple Haze]

pull your distributor and check that the oil pump drive gear did not shear the pin or is still a press fit.