Want to lower my truck

[85 C10]

I want to lower my 85 c10 like a 4/6. it is already lowered but not sure how much. the guy I got it off of bought it that way. I think it is like a 2/4. is there anyway to tell I have looked at the rear axle and it does not have a flip kit. thank you for any and all help

 

[pmayojr]

Any way you can post pics from the side and of the rear shackles

 

[J Knight]

Yeah, we need pics of your suspension front and rear with the weight on it to see what was done to it.