Here is some of my research on bearings so far. I originally found a diagram on the forums that lead me towards some incorrect parts.
This diagram looks to be from a newer manual. For some reason they show the needle bearings being only 20mm long. Mine are 28mm long. For the front counter shaft bearing they have chosen to use a regular roller ball bearing. The original is a 2 part bearing that the inner race is pressed on the counter shaft. By having only the inner race pressed on it makes it easier to swing shaft out of case. If you use the one piece 6205 bearing you would have to press the shaft out of the front bearing. The two piece bearing allows the inner race to come out freely.
This is a photo of the early manual diagram with some details written on it. I started with the parts catalog pa rupert numbers and then checked my trans for part numbers. The 65 trans had been rebuilt sometime and did not have stock bearings. My 67 and the parts 63 appear to be original and not previously apart. All bearings in them are NSK brand. I found a site that provided a cross reference of the nissan 10 digit part number to all known part numbers. I was able to draw SKF numbers from there and they are similar to the original NSK part numbers. The N suffix means the bearing has an outer groove, NR means about the same but it comes with the necessary locking ring.