Hey all, I'm totally perplexed by this one. A guy is selling what he thinks is a 1952 Chevy 235. The numbers on it are:

N375583DAL
3701887
GM3

I can't find either "3701887" or "375583" on the list of casting numbers at http://www.inliners.org/becks/BCN2.html or http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/cast.html

Any ideas on what these numbers should be telling me? What the heck is this motor?

Best,
Nick