how can i smooth out my 320. i feel like i get more up and down then i should, and dont know what to change and what is worth buying....

 

Do you have standard wheels and tyres or specialk equipment low profile?
Low profile wreck the ride but improve the response/handling.
Stuart

 

im pretty sure its not my tires, it i push down on the rear end i feel like i get too much rebound, i just dont know whats out there to improve the stability/smoothness of the ride

 

if you go over speed bump and afterwards, the car continues to pogo more than once/twice, it prob is due to your shocks losing it's damping ability. for a car of your vintage, it seems a bit odd, but in real life, it's the accumulated road conditions, not age which determines the life span of a shock. so when you push down on a fender, does it smartly rebounds up and then down....or does it absorbs and slowly recovers? if it rebounds too quickly, it's time to replace the shocks.