stepped lower control arm, want to lower 2"

[MT71c-10]

I have a 71 c-10 lwb 350, manual trans was original, with Chisolm stepped 1 1/2" tubular lower control arms. I need to lower the front 2" to match up the fender gap with the rear. From ground to top of fender arch is (I think 32", can't remember and it is up in air now) So that brings me to a few questions.

1. There is a sticker on the control arm that says ( do not use drop spindles or other devices to lower this vehicle beyond the design limits of this assembly) I would like to use spindles but springs will be fine, but can I do this safely?

2. If I can use lowered springs, I am going to cut a coil or two to see if that will match up to what I want?

3. I don't know if I already have a lowered spring on this truck, does anybody have a set of stock springs off a matching truck that could give me a free length measurement, or know how to find out what I have?

Thanks for your time guys.
Nick