bell crank z-bar stud issue

[crazy longhorn]

Originally Posted by marvgarr68

I know its strange but I just checked it again as it is in another truck that's automatic and they are fine thread. I have never found another like it that is why I thought the op had the same thing his is a 75. This is a car block not a truck.

I should not say 'always, or never"....but here is a thought!? Some of the blocks had the bosses, but were not drilled....perhaps @ 1 point somebody drilled /tapped the bosses, & that could be what you are seeing? Any of the factory blocks, that I have been involved with (62-82 on the yrs), car or truck, have been 1/2 coarse thread on the block pivot ball. To the original poster, I would clean the threaded holes with a rifle brush, & shoot a little brake clean in em, as they may be plugged with grime/crud? Longhorn