hey tom, i have the casting numbers if you can identify them, that would be great. 3701887 gm 6 con13 1223. those were on top of the head, inside the valve cover. thanks. just trying to be sure. dad always said to measure twice and cut once.
really like the stovebolt site. not the sharpest file in the drawer when it comes to computors. better at rebuilding parts. hope im in thanks guys rodC66
