strangely enough, it appears to be a masons hammer.
Yes back in my young and stupid days when I would let all the girls use my tool.You should keep better track of your tools.
I recently upgraded my inlet manifold. This is genuinely what I found under the valley gasket!
No apparent damage.
I’m still stunned!!
View attachment 147495
I rebuilt my first engine, 1970 429 CJ in a GT Torino, one rod end wasn’t torqued properly and when I had to repair it, I found I’d left a screwdriver in the lifter galley, and no damage happened to my engine either. Things happen