69 gmc rear drop???

['69 Gmc]

I have a 1969 swb gmc. Of course it is leaf rear. I'm on the fence about the flip kit or a drop shackle and removing the helper. I have 3 leafs and a helper. From what I've researched some had 5/1 springs and some 3/1 springs. Some (I'm assuming with the 5/1) said that they left 3 springs to get the drop. I'm asking if anyone knows if I had a 2" drop shackle amd remove the helper (I'd have just 3 leafs) how low it would sit. I know they say the flip is about 5" but is that with the 5leaf pack? I'd like to have around a 4" drop in the rear. Any help appriciated.
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