Replace the wood with steel tubing.
There is no such thing as similarity in a wood kit except that it is made from wood. Every make had their own dimensions, bends tweaks and turns. You just cannot modify a wood kit from a Ford or Chevy to fit a Studebaker or a Hupmobile or an Oldsmobile or a Conestoga Wagon. Wood doesn't modify well, know what I mean Vern?
There have been several comprehensive, well illustrated articles in rod mags in the last few years showing how the steel tubing is installed in a previously wood-structured car body. Get them, read them, and visit the steel yard. Save yourselves a bunch of money (oak and ash aren't cheap) and a big sackful of aggravation.