['68OrangeSunshine]

I have broken arms off the Z-bars on both my '68 C/10 Stepside w/292 L6, and my '71 GMC Jimmy K/1500 4x4 w/350 V8.
Both Z-bars had been heated and the arms bent, slightly, to clear headers.
On the V8 in a 4X4, the pivot stud seems pretty stout, and is threaded into the side of the block. The L6 set-up [on a C/10] had a stud set in a steel strap that's bolted to the block. The end of the stud is bucked down [with an air hammer?] and looks like it could pop under severe stress.