Ron,
You do properly understand what I was trying to say. I believe logic will support the sound thinking behind it.
I believe Bill merely suggested they not be welded under a specific circumstance; it makes sense to me and sounds like not only good advice but also a means of fine-tuning your alignment with the aid of shims, if permissible, as some vehicle manufacturers already do.
I am not an engineer, nor am I familiar with applicable codes and standards or regulations. Your question becomes too specific for me to comment further with reliability. Casually I'd suggest your impressions can be functionally, albeit perhaps loosely interpreted as correct, if not more so.
I do work with an engineer or two from time to time and I occasionally am criticized for over-building. It is a family tradition of which I am proud and although I am sometimes chided for my caution, it also is one reasion I am chosen for the work; it might be described as quality. (others who know me say I dont know how to use a stress table... but only with a smile)
Be advised the grade of nut must match or exceed the grade of bolt, and there are torque tables which should perhaps be referenced.
Regards,
d