Conversion axle install; any tips?

[Jonny Hotnuts]

70 swb
75" between backing

-Have the 6 to 5 axles coming this week from EC.


I have never swapped axles before.
I cant find any 67-72 specific axle conversion 'how to' videos.


Is there any special tools I will need?
Will I need (*or should) to replace the differential fluid, if so what weight and how much will I need?
Can anyone point me to a 'good' video of the axle swap? (too many 'how to' vids done with bad info. I cant tell if one is good or not!) OR a site with a 'how to' pictorial.


Thanks for any advice!