this is my first post,and i would like to say that this is one awsome site. my question is, I just got a free junk front axel, for a 80's chevy,but it came with a drop steering arm, and leaf springs, that have a positive arch to them. the guy said it was a 4inch lift, and he gave me some 4inch blocks. I got them home, got the springs off. I put a strait edge across the two leaf spring bolt holes, and measured them, from the holes to the bottom of the 6 leafs, it was 6 and a half inches i'm going to put these on my 85 k20, i just want to know how much lift it will give me.