Lowering

[1970 C10 MJW]

I am new a member, I have a 1970 C10 LWB 350 vortec roller motor, th350, converted the front to disc brakes, i am planning on doing a build thread, anyways...
I am wanting to lower my 70 but not spend a lot, are those coil spring clamps ok to use? i want to see if i like the look and ride before i buy the springs. I was thinking bout doing either 2" front and 2" back or just 2" front to get a racked look, will i have to do any body or frame mods to do this? thanks guys!