Rommel, is the vibration on one side, or just from the front end?All ball joints, bushings, and linkages are new? Does your steering wheel also shake?
If you swapped the wheels to the rear, the vibration should have followed if related to the wheels/tires.
Vikki, wheels were balanced off the car. I bought a pair of SS's with the correct bolt pattern in 15" for the rear. No problems there. If I know I'm going for a longer cruise at highway speed, I mount the rally II's. Smooth as glass.
I'm a hobbyist. Not a professional. Don't be hatin'!