rear end height 96 cutlass

Any ideas on how to raise the rear end on this 96 supreme?

new sturts and coils? rose the rear end on my olds delta 88 a good height...i replaced all 4 struts and coils...thing is now its a harder suspension....think i got sold the wrong parts...but the car is higher...just a little bit harder...you can probably do with a rear end replacement no problem