Well, I feel a little dumb at the moment. I have a cousin that works at a spring shop and he offered to take the springs down for me if I pulled them out. Before I yanked the spring I had installed, I decide to double check my measurements. It suddenly occurred to me that I should jack up the side I hadn't put the spring in to see if it changes at all. Low and behold, When I even out the frame heights and fender heights, I'm right at 41 1/8".
My goal was to be around 40 - 40.5" after to give my differential a little more clearance. I should be at the higher end of that after the springs settle for a year. Not sure it'll be worth de-arching for a 1/2" drop or less. I'll put the passenger side spring in and run it for the summer and see how it goes. I can always pull them out this winter if I don't like where I'm at.