As I feared the cylinder is toast

. Sorry to hear man.
Why the 2 bolt main block? You going to splay it. I know of a 350 2-bolt 1-piece rear seal if you can't find the older block.
__________________
, Jon
Owner of a Red Sled.
If it\'s EFI I can tune it. Specialize in 82-95 GM (yes Lt1\'s)
\"If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn.......Then, you have enough horsepower\" - Mark Donohue