Required or . . . Crank/converter bushing

From 1968 and up, all 904 converters had a pilot (one that goes into the crank) size of 1.810 inches
From 1960 to 1967 the converter pilot size is 1.550 inch
Now, I may be wrong on this, but I think that the crank for a standard transmission was different from crank for an automatic transmission. I'm not 100% sure on this for a Chrysler (mine have all been automatics) but GM had two different cranks depending if the car had an automatic or a standard. The pilot size of a converter is larger than the size of the pilot of the sticks input shaft.