Lowering a 79 2wd Blazer - ?

[68Timber]

I finally found a set of correct new rear leaf springs at a decent price. Once they're on I can put my wheel/tire combo on, lower it, and put new coil springs on front to level it out.

I'd originally guessed a 2/2 drop would put it where I want, based on how it sits now with sagging springs. The plan is to use 2" rear drop shackles. Will they bolt up to the Blazer without any cutting or other clearancing?