Guess I'm just a sucker for these kind of questions.

If it's possible that your first number is a 3 instead of a 6,
this page:

http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/1916-57cast.html

shows that 3836848 is the number from a 1956 235 head.

Might that be possible?


"Nothing astonishes men so much as common sense and plain dealing." - Ralph Waldo Emerson