51 and 53 resto packs say 4.57:1 rear ends in the 3600 with the
5.14:1 as a RPO (regular production option).

I would imagine the 52 would be the same.

http://chevy.tocmp.com/chevyresto/51126.htm

http://chevy.tocmp.com/chevyresto/53132.htm

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