Most occasions where I've found a bolt completely missing at some point after I've worked on something it's usually been where I've thought to line up and rough set the assembly first before torquing everything home, ---- and then recall having 'forgotten' that last little detail.
For reference, I had an end pull right through the A-arm hole once from extra strain using hiem joints. Otherwise, I imagine if the ends were incorrectly too long it could put the bar in bind to the frame at full travel. But, if you find no evidence of binding, twisting or defect with the bar or arm or other susp. parts then count your blessings and just replace the ends. I'm sure there's a spec on torque, but a rough guide is tighten until bushings compress to at least the washers' diameter.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!