In this vendor's catalog there is an exploded view of a 55'-65' 3-speed Saginaw tranny and on p 2 (under 3-speed Saginaw) 3743368 is listed as being made from 58-63.

http://1962-79chevynovaparts.com/catalogPDFs/X2%2002%20transmission.pdf

When you google "gm 3743368" there are other references to this being a Corvette
number.


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