Sorry for my goof.  Remembered back then checked.

This is in a Camaro SS, prior numbers not meaningful.

Will try to engage brain in future.

'But, this gent is gun-shy (not a good term this week) about porosity in
the LS-1. What's the block-defect warranty on the crate engine? By the
time he springs for the crate plus the installation labor--probably a
couple of more grand, he might be better off laying out a disclosure and
selling it, 'as-is' and maybe getting 9 or 10 grand for it'

REPLY:  GM has chosen to stick with the alum. block and heads for the
LS2 and LS7 , so maybe his bad experience with his LS1 was a fluke. (?).
If the gent is gun shy then he should try selling it 'as is ' with
disclosure to see if someone is willing to buy it -- I think he should
opt for a new LS1 crate motor with warranty and keep the car for a very
long time.  

I'm not sure how you can resolve this issue economically without going
back to the original engine design. There may be a similar design cast
iron truck engine that could be re-cammed that would fit the pattern
and computer requirements but it would take some research to fine what
you need. If I remember correctly the LS2 started out as a truck motor
but I'm not sure it had a cast iron version although something makes
me think it was at one time. The fellow I know that worked at the GM
Powertrain plant that would know is in Florida for another month.

Personally I would have no fear of putting an LS1 back in. They are a
good engine and they will have the occasional bad part in one just
like everything else in this world. My '63 had a bad crank in it and
it took forever to get GM to replace it, in fact the engine came in
after I had made a deal with the dealer and traded in for a '64.

Good luck,