Mud, Get a soft face hammer, like a dead blow
or a heavy rubber mallet and roll the sheet metal
seam on the bottom of the rocker sill, it will give
you a little more clearance, you might even work
the bottom of the sill to a little more flat shape
with the hammer and tuck those sliders right
next to the body.
I like the 75mm square tubing, I think that is a
little more robust for rock pounding, I would
change the angle on the square tubing a little,
so that the tubing is close to the bottom of the
frame, and higher than the sill on that end, then
use some angle to drop down to just below the
sill and out, then some more square or round tubing
for outside sill protection, this way you will gain
almost 100 mm more clearance, and then you could
add (bolt on) side skid plates to protect the body
mounts and rear track arm mounts. Now you are
just a tick away from a full belly pan

Wild