Time for the:
MODIFICATION ALERT !!!
ok, I found a "issue"
You know the whole fitting debate bullshit of other threads? Ya..its soooo complicated..
Its the Boot, its big, it makes things a pain. installing the boot/axle like normal does not work as far as I can tell in any way.
BUT there is a simple solution for your install process.
In this order:
put the boot on the axle
INSTALL the axle.
THEN install the knuckle
(lower hole first, swing up and then upper hole)
to make the install simple go and thread the nut on your upper ball joint and shave 1/8 of thread off, clean the edges and then take the nut off.
that is what i did. put nut on thread, cut 1/8 off from bottom of threads, clean edges and it was good to go. the video later on was BEFORE I did this and you will see I had to tap it into place. After cutting off some extra thread it went on/off with ease.
make a 1/8 "channel" on the upper part of the knuckle for the ball joint bolt to go in.
Someone will say: "but if I break my ultrakilla RCV shaft on the trail I will have to pull the knuckle to remove it"
Take a razor, cut the boot, remove the boot, pull the shaft out the knuckle like normal. if you killed a RCV on the trail the boot is the least of your worries and they are reasonably priced.
If you brought a spare axle with you it will install through the knuckle hole like normal.