difference in neg camber upper control arms?

[Stg1Regal]

With all the cool stuff out there for better suspension geometry, like taller spindles, taller upper& lower ball joints, heck even those spindle extenders, all of wich give you better Negative camber.

I know the upper control arm , has to be, or is shorter in length to benifit the upgrade.

By how much shorter are they?

Seen various manufactures offer them, but they all seem to inclued a off-set control arm shaft.

Is that the only difference, or is the tubular design styles offered still yet shorter?

I have a older article where a G-body was upgraded to B-body spindles, they kept the factory upper arm and used a offset shaft with the factory alignment spacers, seemed to work well.

However it put the arms stamped edges closer to the headers, a little trimming was done on the arms.

I've seen on a couple other forums that guys were using a roundy round upper arm from one side of a metric chassis set up, flipping it over to be used on the other side, and they stated it was inexpensive, and the manufacture would weld them up to any length desired.

Could that be done , and not use a offset shaft, and still have the benefits?