Pilot shaft diameter

Question: The pilot shaft of my A833 is measuring .750, however I can insert a .825 (.075 difference) piece of bar stock in the pilot shaft hole in the crankshaft. The crank was originally used with a 904. I had the crankshaft register modified to accept a larger torque converter, (I was going to go back with a 904 set up but elected to go manual) the pilot hole for a manual transmission wasn't touched. This is a 1965 slant 6 build. Do I need a bushing? or am I reading too much into it. A bushing to reduce the pilot hole from .825 to .750 would be an awfully thin bushing.
Norm