Do any head bolts thread through water jacket on 67 400 head/block assembly?

If yes, which ones?

Trying to avoid seepage/leakage if there is potential for leaks....

Thanks,

 

Yes, I'd have to go look at a block but I think they all thread into the water jacket. John

 

That is what Chevrolet was good for, Not Oldsmobile.
I have not looked at a 400 E block in over a decade, but...
All 330, 350, 403, late 400 (G), 425, and 455 engines that I have worked on lately had blind head bolt bosses, I would think the 400 E would be no different.
There should be no reason your head bolts go into the jacket.
Jim

 

400s have blind head bolt holes.

 

My goof, sorry for the mis-information.
John