lift for a factory 65 4X4

[dodgiesdad]

I have a 65 K-10 short bed. It is sitting on the original springs, but has newer axles front and rear (best I can tell out of a 71 Blazer). The factory springs are very tired, I am hoping to redo the suspension in the spring. I would like to get 2-3 more inches out of it. Short of custom springs has anyone found springs from something else that bolt in and get this, or add-a-leafs? Any ideas would be appreciated. I am currently running 33"s but would like to get to 35"s, but more importantly get the right stance.