Yes you can, but you'll need an alignment. Also I'd consider that as "adding height to your spindle" (same goes for using tall uppers), and any time you do that you'll need to re-shim your uppers. I used 0.5" taller uppers with stock upper A-arms and was still able to achieve factory alignment specs with them. (0.5" taller lowers should be the exact same.) And that
was done at an alignment shop, so I didn't have to do that myself.
Also, you may have read that I switched to Spohn "Tall Spindle" Uppers. I only did that to be able to get to -2 degrees camber without an extreme amount of shims, and to increase header clearance for my Buick engine.
For reference, these are some reference photos I took before swapping to my tubular upper A-arms.
This should be at -1 degree camber if I remember correctly. Note the shim count.
Also note that I'm using offset cross shafts in the stock uppers here. I could have flipped them to decrease the shim count. That being said, with the orientation pictured they're actually
increasing the necessary shim count. So with non-offset cross shafts and factory camber specs, your shim count should be lower than this. And even lower with flipped offset cross shafts.
View attachment 80960 View attachment 80961
EDIT: If that wasn't -1 degree camber pictured, then it may have been between 0 and -0.5 degrees. Even if so, I stand by my suggestion of the extended lowers being doable with an otherwise stock front end.