anothe valve body question

The valve body will interchange but what pump did you use? The 76 pump? The early trans. like yours used a 1/2" wide front clutch carrier to reaction support bushing where-as the later units (70 and up) used a 1" wide bushing so you have to change both those parts for it to work. The input splines are also a different count old to new so if you put a newer input shaft in you'll need to also change the converter to match.