Asking for assistance with Imperial ride height issue

Hey guys, first off, I have a 66 Imperial Crown 4 door hardtop. Just replaced the original, EXTREMELY worn leaf springs with a new heavy duty set from Espo. It looks kinda nuts - very jacked up in the rear, which sure isn't right for this car.

Now I know that I can adjust the front end up, but the front end is actually at the height I want it. Just want to see if I can get the rear down somehow. I have heard of lowering blocks but don't know if that is the only or best method of adjusting...

Asking for assistance with Imperial ride height issue
Author: Crown of 66