need help lowering

I have a 2000 tahoe and want a 3/5 drop.Should I buy the whole kit or just shackels and hangers?I have had few people tell me to go with the 2nd option.I need some help!

Shackles and hangers won't work, these trucks have coil spring rears unless you have an obs truck (5.7). Best way seems to be:
Front
2" Drop Spindles
3/4ton Torsion Keys
Doetsch Tech Shocks or anything quality
Rear
5" Coils
Drop Shocks or Extensions
Trim the frame and install lower profile bumpstop

http://www.djmsuspension.com/Articles/FreeTravel.htm
Use the SEARCH function, lowering these trucks has been discussed at great length.