The reason I upgraded to poly bushings is : My car is only used in good weather . I needed bushings that didn't need to be replaced as often . I've seen rubber bushings go bad just sitting there . Next : I wanted a tighter suspension because I have a big block .
I have hd bars and springs because the oem's were shot .
I tried modern alignment and my car was dangerous to drive . Went to factory specs and is now straight and true .
My car doesn't ride like a baby carriage because that's the way I designed it 15 years ago . I wanted the experience of driving a 60/70's car with modern braking . Safety was my goal . good luck to all a-body builders out there . It is worth it .