Less Gear, downgrading leafs

I think you were being asked if you had the front end alignment checked. When you installed the SS springs & it raised the rear of the car, that affected to front end alignment. Probably not by much, but probably enough to affect the handling.

If it's a street car, my suggestion would be to have the alignment shop set it to these specs:
Typical HP street alignment
Camber -.5 Caster +2.5* Toe In 1/16-1/8"
Check it out & see how close your car is, Just a suggestion.