Will these add any noticable lift to my truck? also what are the dangers of using these?

 

On what, rear leafs? Year, make, model, 2wd, 4wd helps in ALL posts for help btw.
Usually when a persons ride has a saggy rear they do an Add-A-Leaf or replace/upgrade the leaf spring pack.
What spring spacers are you talking about? Shackles? Look them up in here, possibly 45,000 posts about shackles & t bar twists lol.
Lots to read & decide about on them.
Rear shackles are common to raise the rear & keep in mind that often a "2" shackle lift kit" only adds 1" of lift because it's only lifting half the rear leaf. To get 2" of true lift you'll need shackles that are 4" longer than stock.

 

His profile says 2002 4 door 2wd. So I'm thinking he means coil spacers for the front.

Yes they will lift it, I can only assume it'll add some extra wear on a few of the front end components. I don't have any first hand experience with lifting a 2wd though.

Do some searching and I'm sure you'll find something on it in here.

 

I didn't look at profile but when I 1st saw "spring spacers" for some reason I thought coils. But I had to ask.

 

What do you suggest i do? My rear end isnt sagging, the shocks and everything are newer. I just want a couple inches of lift without a full blown $400 lift kit.