Wow, sounds like you have a treasure chest of information! But, I definately would NOT be needing anything as far back as the beginning Only the cars with X-Frames which usually started circa 1932-1933. Not sure with Studebaker so my interest would be the 1930s up to and including 1946. mainly frame diagrams with dimensions only. That should narrow things down huh... We can assume that Studebaker, even for convertible models between 1947-1952, did not use the X-beam reinforcement for their frames until 1959-1964 Lark and 1963-64 Avanti? Those I have. Thanks!!! Eric