Fred, Seems to me from what you write that what is critical between the 53 column shift assembly and the 56-59 assembly is that they both locate the shift box under the hood in the same place with respect to the transmission so that the rods from the 56-59 will work on the 53 assembly. Do I have that right? If so, it sounds like I could use the later rods on the 53 column shift assembly.
Jerry