I read in another thread that someone has heard of modifying unposted heads by drilling through the top of the head, screwing a stud down into the head to the top of the combustion chamber, and maybe threading a locking nut on top of the head to keep it in place (maybe even welding the top of the stud to reduce height?)



Has anyone modified their unposted heads with a home-made post to help support the top of the combustion chamber?



I've got big letter ECZ-G heads that are unposted and would love to know of a plausible remedy to posting my heads....



Thanks, Ryan


Heber City, UT (15 mins outside of Park City- basically it's in the mountains)

55 Effie

Here’s a picture showing the locations of where the factory added the posts to the late ’57 and newer heads. The dotted lines shows the actual post locations while the arrows simply point to the water holes that are used to 'feel' for the posts. Like John, when adding posts to what was originally non posted heads, I’ve only seen it done to the #3 and #6 cylinders but adding the posts to the #1 & #8 cylinders would also be recommended. Although I've only observed this being performed by coming in from the top, adding posts from the deck side does sound less complicated but the decks are likely on the thin side to adequately thread for this. Maybe Vic will comment on if he added his posts from the top or the bottom?

And here’s the link to the thread that particular picture comes from along with some more detail.

http://forums.y-blocksforever.com/Topic6711-3-1.aspx

http://forums.y-blocksforever.com/Topic6711.aspx

Lorena, Texas (South of Waco)