Over the years, I have search hi & lo for an original '32 V8 fan. I am fortunate enough to have obtained two of them. In the 'Green Book', the part # is 18-8600 and it describes the total lengthy from hub base to blade as 4 ½”. Mine are that dimension +/- 1/16”. I also have a 59AB engine in a stock ’32 frame, stock trans K member and stock ’32 V8 mount. The fan blade easily clears the original V8 radiator.
In fact, I see that I may have move it slightly closer to the rad…maybe not! The ’33 – ’36 fans are much too short….so something is strange on your set-up. Please check the overall length of your fan. Hope this helps
Robert