torsion bar and ps box upgrade

ok so my car being a 75, i will be looking for the later model bearings.

i also picked up my ss springs from a craigslist guy. on my car, i have these sort of "drop brackets" for mounting the rear of the spring. there are 4-5 holes i can choose from to "lift" the rear of the car. is this something i can use with the ss springs, or are the brackets used for stock springs only?

i ask because i read about the ss springs leaving the car unbalanced side to side. could i just mount one spring lower or higher than the other to make the car sit level?