An example of how I kept the heat from warping the metal as I rosette welded the inner and outer rockers together.

(flipped) Passenger side outer rocker welds from the above method.

Note: If I could weld from the existing holes where I drilled the old welds out of, I did that.  Here I had to drill  holes to weld through in the inner rocker as I couldn't weld from the other side.

Close up of above welding area (by passenger B-Pillar).

Area of passenger B-Pillar after welding and wire brushing (after welding above picture).

Rear torque box prior to prep/welding.

Rear torque box after welding to inner rocker.  Note: I tried to get the welders ground clamp as close to the weld area as possible to aid in weld penetration.