A Question about exhaust manifold bolts

I recently purchased a set of 360 small block heads. I installed them and put coolant into the system. Decided to swap headers and when I pulled the last bolt on the back of the exhaust manifold, coolant came flowing out. I think there is normally a stud in that location which was missing when I got them. Do both the front and rear holes both go into the coolant jacket?

yes. btw, i have headers and i left the end studs in for that reason.

Me to..