Sorry, Eric you are misinformed on the z-bar.
The small block z bar is mounted to the frame by a small stud.
The big Block z bar is longer and there is a pivot ball on the frame and engine, allowing the z bar to sit at an angle due to the engine pivot ball being 3/4" farther forward.
So that patronizing "sorry, you're wrong" wasn't supposed to set me off? I'm sorry, but I know you are very active here and give a lot of advice... But when you say things so definitively and with little pictures with circles and arrows, and a paragraph on the back of each on, explainin what each one was (not too late for a little "Alice's Restaurant" reference), and say things like a small block z-bar has a fixed stud on the end... And that a 1st gen BBC z-bar sits at an angle, folks start to question your advice.
You and I have butted heads on 1st gen BBC install info before, and even when I have bothered Jerry M. to clarify what I understand to be true, and have tried to get you to understand things like z-bar mounting, you go back to passing on erroneous info.
And when I try to get you to think it through, about details like if the bar was meant to be installed crooked, why would the linkage holes remain perpendicular and the rod ends 90 degrees, you just don't address that at all.
So I am not ranting. I just get tired of trying to explain. I installed my BBC and manual the way the AIM, Jerry's book, personal close up examinations of OE installs, etc. I've done a lot of research, and have plenty of hands on BBC and BBC installs in 1st gens. Likewise with SBC. I don't know where you learned what you think you know.
Mods, you can delete this if you want; I would have PM'ed if I cared enough, but I just don't like erroneous info being spoken as gospel.
Likewise to Ron, the OP, I hope your work is going okay and you know what you need to know. Post back or PM if you need more.