You won't need new spring plates but replacing the U-bolts is always a good idea. All I need to get my steering corrected when I did my SOA was a dropped pittman arm. My drag link is parallel to my tie rod and does not hit the passenger side spring when its flexed out. If you did go with some higher arched springs than stock, then high steer would be the proper way to correct the steering. The thing I love about a SOA is all the ground clearance you get with none of the knuckle dragging spring plates and U-bolts of a SUA set up. Plus the flex and ride a whole lot better.
Beat it to fit, paint it to match!
Wheel, Wrench, Repeat.