Thanks guys. All the bolts look the same, no slots.
Well, I tried to drill out the head bolt, got most of way then the bit broke. So I took the easy way and ground a groove in the threads . Then I reassembled the rocker shaft and spun the bejesus out of the oil pump with my drill and custom screw driver. I got oil bubbling up from the holes in the rear rocker shaft but not the front. Hmm. Pulled the shaft again. The front shaft had the rocker oil holes facing down, while the rear did not. I had reassembled it just the way it came out ( I am positive because I had left one tower on the shaft that was stuck). So, I reinstalled it with the holes facing up, and viola, oil from the rockers!
I can only assume that someone long ago had flubbed it on reassembly.
So after much toil I now have oiling rockers! Thanks to everyone!
