Cutting Springs?

[mr48chev]

As 72Freak said you can cut the fronts although the naysayers will tell you not to. It has been since people started lowering coil spring rigs and the biggest rub will be that the truck might ride a bit harsher. You should have the alignment redone after you do it though. I'd use a cutoff wheel rather than a torch.
On the rears you are going to have to change the coils to do it right. Heating the coil is the way a lot of guys used to do it but they usually keep sagging and there is a great chance that they will break at some time or another. There are also lowering blocks to get a couple if inches of drop but I think that they come close to the price of new coils.