hmmm where to start..... seach the general forum lots of guys mix/match suff, look for "threaded insert" AND TRE,
note: searchs do work better if you use word quallifiers (AND OR NOT) and try common mispellings

and narrow the forums to 1 at a time...
TRE, I used the end that was with my "Z" bar (maybe someone has a part ##) I used a welded insert into a 1 1/4" .120 chromoly tube and used a 7/8" (chevy) insert and TRE to the high toy stuff...
point being i made my own used off the shelf ends that fit my needs.... if necessary i can post my stuff, but it all came from the general forum threads, (search "1 ton" chevy ends or what ever)
1st goround i got 7/8 NF tube inserts from avelanche -$15 ? each they have both right and left hand thread, jam nuts etc..
they also had 3/4" (~ 1/2 - 3/4 ton sized ends...) inserts/jams etc..
I had other 3/4 inserts from chassisshop.com that also fit my tube, so i use those.....
I bought last set of ends from buggysupply.com (linked in somoenese sig.) they were easy to deal with, they will also sell tube /ft. if you dont need a lot....
Fixing pitman arms is up to you, buy new, make your own, used whateven end came with it along with your other stuff...
there was a thread in general a few weeks ago on wher to get 7/8 LH taps to make your own inserts...
Also a tapered reamer is hand to make your own junk...
edit: TRE are used on cars becasue they "usually" will get so unbearable loose or bend before they break..... plus i can buy a 1ton chev end for $25 with a lifetime warenty, and trust me if i break that ive got other problems....
-yag