65 C10 lowering

I would like to lower my all stock 65 C10. Right now the distance from the ground to the bottom of the front bumper is 14 in and 19 in the rear. To me this is just way too out of wack ! Will probably do it with springs but just not sure the best way to go. So heres some of my questions if anyone has any suggestions.

If I were to just lower the back 4 inches to make it a little me even, would it cause any problems in any areas, drive line etc ? Also what parts do I need other than the springs ?

Thanks, Billy

I DO see that this inquiry is a couple of months old.... I recently lowered my 68 suburban with two inch lowering blocks from CPP. The truck arms suspensions have the springs and shocks all tied to the truck arms, so the only item you need other than the blocks and u-bolt kit, is one of CPPs adjustable track bars. These bars adjust like a big'ol turnbuckle, so very easy to use. Two inches is the tallest blocks CPP shows offering, but the u-bolts for these are at least an inch too long...