I haven't built the front axle yet. I also don't have the steering box either.
Bottom trunnion
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I have the straight version of the steering arms. The holes are Toyota taper for the Tie rod ends and the bolt holes are countersunk Allen head bolts.
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I have to take my knuckles to the machine shop to have them machined to fit the key ways in the steering arms.
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I have the tie rod ends threaded into the tie rod and the relay rod, but will assemble them when get the axle assembled whenever I get home long enough to work on it.
There are other Mud members that have used FJ70 tie rod and relay rods with FJ70 tie rod ends and the FJ80 steering box like Pablo Cruise in CO, he has photos.
I got the steering arms, trunnions and bearings from Front Range Off Road in Colorado. They drilled the tapered holes in the steering arms for the Tie Rod Ends for me.
I upgraded to FJ70 tie rod and relay rod and tie rod ends because they are bigger and stouter than FJ40 parts. I the right clamps from SOR and they had a record of the tie rod and relay rods I had bought and sent the right ones. The lengths are very close to FJ40 rods since the tracks are the same.