I installed nuespeed springs on stock shocks with about 5k miles on em.
The left rear side sits a bit lowere than the right. Will alignment do the trick or should I go back to stock.
I bought them dirt cheap cause they were used, but they weren't used very long.

 

how much lower?

 

Many stock cars are not even. Did you check it before you installed the springs? (alignment will have minimal or no impact on ride height).