Actually this one has been just sitting for 4 years as a backup motor for my Nova. I think the machinist would stand behind it (bought the bare block from him then spent the bucks on it) if I brought it back to him like 3.8 years ago!!!! LMAO..
check this out,, even with a droid phone cam you can see the failure is only down through the deck and first ring,, but moving down towards the second ring.
http://www.small-block-chevy.com/ima...0/400blk_a.jpg
http://www.small-block-chevy.com/ima...0/400blk_b.jpg
http://www.small-block-chevy.com/ima...0/400blk_c.jpg
http://www.small-block-chevy.com/ima...0/400blk_d.jpg
(gotta document al thes before I ream the ridge back round to get the piston out without damage ...hopefully!!!)