If you pull the dist. out and run a drill you will never get oil to the top of the block. the dist. housing completes the oil passage on the right side. Oil does take a while to get to that side for some reason. I always pre-oil everything in the valvetrain for just this reason. It may take a minute to get oil to that side of the block so just be patient but DO put oil on the rockers and valve springs for that time.