Originally Posted by JimN
Did it run rough at any time?
Overheating it once doesn't kill a Chevy 350 unless it goes on for a really long time. They do a lot of destructive testing on their motors and this includes running them with no coolant and with no oil (separate tests). One of my friends worked at the Desert Proving grounds and they got about 250 miles out of a Cavalier with no oil. They ran a Corvette with the ZR-1 with no coolant and it never seized- it just burned up the gaskets.
No the engine performed perfect. The knock did not start until the next time on the water. Started it up on the trailer and immediatly heard the noise. The engine still has full compression and is not locked up.