OLDS ID.. cant really find numbers

ok, so i can find early olds (303 and some early 324) block numbers.. and late (394) numbers... but nothing really in the mid-late 50's.. so the numbers i have are (i think this is the one from the pad on the block between exhaust ports)

V376693

if anyone can identify this number and let me know what year the engine is that would be cool.

 

number on bellhousing is 567405.. which by looking through different threads alsewhere on the net would slate the engine as a 56?

 

anyone?

 

I can check my notes when I get home.

 

what's the number on the center exhaust port?? cast in pretty big numbers, like an 8 or a 10

 

Those would be for the cylinder heads.

 

back up.