I want to lift my rear seats for possible a subwoofer box but if not at least a spot to use as storage. What is need to do the lift and is there a directions on how to do this?

 

www.subbox.net

you can buy custom sub boxes that come with two inch lift, make sure the depth of the sub will fit the boxes that they have available for your truck etc..

as for making a lift, Im in the process of doing the same thing, I had my mechanic weld me a 2.5 inch lift.. but the bastard left town before he installed it, but I've found another welder who can do the job for me.. OR and this is the last option and my least favorite

is to take blocks of wood, say a 3x3, and drill holes for bolts to go through then mount your seat on.. of course you have to get bolts 3 inches longer then the current ones in your truck..