For the life of me I cant find it in the search... The title was something like "What the hell goes here?" and it was about the hole through to the water pump pocket at at the top right side of a 400M Ford engine. Need to know how to plug that. Can't seem to find the right size little core plug.
That may have been my post, I did one just like that. But it was a 351. I ended up tapping it with a 3/8 or 1/2 pipe tap, and screwed a brass plug in it. I couldn't find a plug either.