Engine/Transmission Mismatch

Early crank pilot measurements are 1.550 ( - 1966)
Late crank pilot measurements are 1.810. ( 1967 up)
Unfortunately the pilot can't be machined that far due to fact that the pilot is hollow for the input shaft.
Check your input shaft spline count early trans 18 .
Late shaft 27. If you have late trans and early crank a special convertor will need to be built, most companies have no problem doing this .
With the dimension you listed on crank I would clean it out really good and remeasure it.
Good luck Lon: