1965 small block A904 leak
So I went into the garage, took apart and inspected the nasty, grimy slant 6 A904 of the same year that was in the car before. My initial question is answered - there is no bolt that could be tightened. Appears to be somewhat of a design flaw.
Below you can see where it is seeping out on the small A904 (red dashed line).
I looked in the factory service manual and it says to tighten extension housing bolts to 24 foot pounds - does that also apply to the "sprag bolt" that goes through the park lock cable housing?
OIn the left there's a bolt that goes through the park lock cable housing and on the right there is some pivot, but I don't think that can be tightened: