hi i have a 34 coupe solid drop axel at 50-55mph streeing wheel shakes had tires balanced twice switched tires with another car same 65-70mph fine tire wear is even could the rotors be unbalanced?
I wouldn't suspect the rotors. Unless there are big chunks missing out of them the rotational mass isn't large enough to cause a problem. Being that the shake seems to be confined to a certain speed I would have the alignment checked. You didn't say what style frontend you have but split four bars can cause this if they aren't set up correctly. Even the steering system and wheel offsets can add to the mix so give us all of your data.
droped tube front axel 4 bar tie rod has heims drag link has heims also took it to a front end shop he said rotors a buddy told me that also don't know what to do can't keep throwing parts at it