Drop Coil Springs

[InTeNsE98RT]

I got my truck down to bare frame and im wanting to get some drop coils to lower it, can I just get 2 inch front drop coils and 4 inch rear drop coils with some drop shocks and that would be enough or will I need other parts? Also what are some good places to buy these, I found a place on ebay that sells them pretty cheap but I worry that cheaper coils would eventually break leaving me in a dangerous situation if driving. Im a newbie when it comes to these trucks so sorry for any stupid questions lol

Here is the link to the ebay coils http://cgi.ebay.com/ebaymotors/67-72...spagenameZWDVW