leveling
 

I would like to level the front of my 1996 chevy c1500, they offer a 1.5" and 2.5" leveling spacer kit, which one will I need?

depends on how high you want to go.

not to be sarcastic but that is an obvious answer, the question was meant to say, with two different "leveling" hieghts which one will actually make it level?

Go on flat ground and measure the height difference of your rear and the front then get which levelin kit would fill that void