After 40 years the springs in my '70 383 Barracuda were a bit saggy so I thought I would do the right thing& & upgrade to the MP heavy duty 440/Hemi spring.

BIG mistake, in less than 2 years the MP "heavy duty" springs sagged even more than the 40 year old factory springs.

My advice, If you can't find a quality spring man to re work your springs DO NOT buy MP springs, you will regret it if you do.

Buy springs made in the US, I'm sure the quality would be better.