I think I lost an inch of clearance on 26" tires, because few factors:
1. WE shocks came already preload adjusted, with a locking nut about an inch down from from the top, I eased it even more until the spring became loose and then i tighten it back but about 1/2" up from the original position.
2. Then I think WE shocks springs are softer then originals so some sagging
I guess I could push a arm down until it stops and then weld mounts. It was anyway not too much travel down, from my measurements, tires off and just let the a arm go down with its own weight, eye to eye of mounts with original shocks was 36 cm, after taking off lower end of shock and pushing a arm down , eye to eye was 36.5 cm, 5 mm only gain.
I'm going back tonight and I will remeasure it again , it will be from the bottom to the edge of lower frame end.