So I have a 56 with a 272 and I noticed no oil is going to the rockers.. at all.. Pulled the rockers off and cleared out the tubes, blew air in the holes in the head and I can hear it blowing through. Put it all back together and still nothing. So I pulled the heads and as far as I can tell its all clear. Now I'm thinking about pulling the cam and taking a look. I don't get it. Any ideas or help would be great.