whisper chipper

Does anyone know what starter would fit here? It’s an older Whisper Chipper, JEY model from what I can barely make out on an old tag, 70’s I’m assuming. I turned the old one in for a core charge for a new starter and the new one wouldn’t fit.

Hi, I recently acquired a 1960's Asplundh Whisper Chipper. It is powered by a Ford 300 I6. It was equipped with an Holley 1949 single barrel carburetor (1 5/8 bore w. 3" bolt centers). The carb is trash corroded beyond rebuilding. I have seen Ford 300's fueled by Autolite 1100's, Carter YF...