Were some Chevy small blocks made in Mexico? Is there anything stamped or coded somehow to indicate that it was made in Mexico or USA (or Canada for that matter?)

Should be a stamp, and the pallet and such its wrapped in will say hecho en mexico.

Thanks, what about a block from the 60's or 70's, not a crate engine?

Here you go, hope this helps :). Seems accurate :D
http://www.old-cars.org/chevrolet/camaro/chevy-camaro-engine-code-explained.html

I've seen a few with "Honcho en Mexico" cast into them.

Thanks guys, that helps :thumbsup:

That Old-Cars.org website looks good too!

Your welcome :) Glad I could help :D