You will have to grind the push rod holes in the head towards the valve cover rail at the top and towards the cylinder at the bottom. You will want to make the holes into pill shapes at each end top and bottom so that by the time you're done you essentially have an hourglass shape push rod hole.
Can this area be machined, and a bronze sleeve put in? I read something about that. Also Are there any pics out there of the work someone has done to accomplish this feat. Pics are great. Thank you.