Ford man is right. Youll feel like your in a funny car... just wont go any faster. Solid polyurethane and moly bushings and mounts for anything is going to make things very stiff/rigid..
Stock rubber mounts on the engine and and tranny are important if you dont want your car to vibrate like a mo fo.
On your suspension components its not as bad.
But any time you use those types its gonna be a rougher ride.