**600hp sbm block limit? Or is it bs!!**

7172 duster said
Shot peened and stress relieved with hard block , .60 over you are border line cylinder wall cracking ,even after sonic check

That is why mine was only bored .030. This stuff about the early 360 blocks being the same as 340 blocks is BS in my opinion. I've yet to see one that was safe to bore .060 much less .100 over.