Vic, I have added posts to head before. I'll see if I can find the pictures I took at the time. The posts go in to the rocker stand above the upper ports, offset from the center. You are trying to go through right next to the port wall so you can't go in the middle of the rocker stand. I used 7/16" bolts and cut off the heads. Cut down the shank of the bolt so it will fit inside of the threaded holes. Spot face the roof of the combustion chamber so the bolt hits a clean, flat surface. I JB weld the threads. When it set up I cut off the thread extending above the rocker stand.

http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico

Has anyone out there added a post or seen it done to a head by drilling through the water jacket and install a threaded rod to reinforce the chamber roof? I was wondering if the threads needed to be brazed or welded. The other thought is to add the post just outside of the compression area under the gasket.

  Vic Correnti