sask42,
here is a site for Canadian casting numbers. Both the head casting number and the block casting number should be listed here:

http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/canchev.html

Fred


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!