Originally Posted by Skooter
Since I'm getting kinda tired of jacking 'er up, pulling wheels, triple checking known good parts (such as brand new wheel cylinders), because it seems I've done it a million times over the last few weeks! headscratch ohwell big_eek

Gonna let 'er sit for a few days at least, but will be sure to check back in when and if a solution is found. Meanwhile keep the suggestions coming. Thanks again!
I understand the frustration. There must be something fundamentally wrong.

Do the shoes move in/out if you pull on them? Do they seem solid when mounted?

I don't think I can help much more than that since you said the cylinders are new. This is presuming they are assembled correctly.