improve ride on 40 Ford pu ??

I have mustang to with coil over and rear gm , ,ch***is eng, leaf spring and shocks , replace shocks ? or ?

 

Is it too stiff? Is it too soft? Does it wallow down the road? Lots a variables and the mustang II front end doesn’t help. Tell us what it is doing. That way we can try and steer you the right direction.

 

the ride is stiff and rough .....

 

If the rear is too stiff, try removing the shocks and drive it, this will tell if the shocks or springs are too stiff (my guess is the springs). If the front coil overs are adjustable, adjust to the softest setting and drive it. Again, it might be the springs.