Clearing up confusion.

[jarfly]

I tried to delete my other post but could not find it the delete button. lol

So i'm 10 different kinds of confused, My current set up is 6" with stacked blocks. I want to get rid of the blocks and thinking about going to 4" of lift.(im on a 34" tire) and in all of this I want to bob the bed and hang the shackles off the bumper so no flipping the shackle.

First of all, How do I set up the shackle angel? I know noob question but we all have them.lol

Ok now for my confustion.
I have 2 choice on spring, stock chevys from 89 2wd or 4" lift springs from a Toyota. Not sure how much lift I would get with the yotas, That would be a trial and error type deal but will have to drive a bit to get them also kind of thrown were the yotas are shorter than a rangers may be better since I want to bob a good bit.
Ok the chevys, I am not going to be doing a shackle flip so I should get 2" lift from a 7" long shackle? Also with the chevy springs I can get 3" from stock springs? Is that correct?
Again sorry for so many post, mods if you can please clean it up or point me how to. thanks for the advice in advance.