No, sorry, I did not record which hole in the coil mount that the S2 bolt came out of. Those bolts were also some of the first removed from the car when I didn't know I needed to be as anal as I am now.

Yes, the manifold-to-head bolts on my blue engine are also maker's mark "E", but they were a size bigger than the coil mount, namely 3/8-16 x 1-5/8. I'll try to post a photo later.

One of my manifold bolts broke off, so the manifold is still stuck to a head. I think it was real close to the exhaust passage - I suppose the heat made it stick. Last time I looked at it, I'm guessing the manifold was factory drilled from the backside, because there is no straight shot to the hole with the carb riser in the way. Its going to be tough to drill out...