My 70 cuda Convertible rides so smooth compared to my 71 cuda both small blocks..the difference is that I wanted a nice crusin car compared to my 71..this is what I did..stock suspension front and rear..no poly crap..moog rubber, has a frt and rear sway bar, bf goodrich ta radials but the best part that made it smooth is the shocks..the fronts are old school oil shocks and the rears are mopar 50-50 race shocks..my friends are amazed at the ride ..even me..its like a daily driver