OK
the numbers are: <drumroll>

block: 3733950 they are in front of the fuel pump
head:3836850 gm5 con9 b28 (all on top of the head)
on the side of the head are the numbers b59 848/850
ummm how does this ell-housing come off? there looks to be cap bolts underneath between the pan and the fly wheel. do these come off?...
wait I have a manual.... duh
Jeremy
bakin' in the sun