randy lee had me down to work on his pony(which is now mine) , as far as where uhhhh im not entirely sure, my internal compase was GARBAGE down there, what i remember is it feeling like an old town stuck in time till you went a few blocks, down hill a long ways then left then right (mind you a total of a 10 min drive, would land you at summitWhen were you in Reno? Fetta GT with GTV6 bits in the suspension? Sounds like the car I just bought.
with the roof bolted it is indeed BUT...i can stress this enough the stock body is THIN and pretty weak, your totaly right about "not needing to worry" but can you put a price on piece of mind?Tidy.
Regarding flex. With the roof bolted on, is the flex resolved? If it is, don't worry about it unless you intend to drive around with the roof unbolted ...
You could measure the torsional strength of the chassis and then compare it to modern cars. If it's as good as a modern Toyota then probably better than a 75/Milano, so all good.