ya know now that i see where your are at, now is the time to install sub frame connectors, unless that is already in your project plans,
dave and i were discussing that subject , and we both agreed that these cars need sub frame connectors,
the only reason i suggest it is my car after several years has developed a body crack behind both rear quarter windows, due to body/frame flex ,it might be worth it now since it will be harder to do it later,
i know it is an added expense, i have seen this problem with other e bodies and it not due to poor body work it is because of body /frame flex , and i have done alot of road racing and street driving and here is the toll it has taken its a rough pic but you will see what i am saying, last summer i installed xv sub frame conn. and the car is a much better car on the street , more stable , and a sure footedness that you can actually feel as you drive the car,just my 2 cents