I just did this on my 1964 /6.
One thing to note, john6464 installed his bearing backwards, the lettering should face out because there is a lip seal built into the bearing. (See pic) It is packed with grease and the lip seal helps keep the grease in place.
I used an actual input shaft as a disc alignment tool and it actually made a suction sound when pulled out.
Also, mine measured a heavy 1.656 after I turned it down, maybe 1.6565. The press fit was a little on the heavy side. I would recommend a range of 1.656/1.655. This doesn't require a real extreme interference fit. Using a snap gage, my bore measured 1.653/1.654. The material is powdered metal so it comes off in powder form, not shavings.
I'm very happy with the result!
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