Today's progress.... Still need to do (alot) of grinding:
Used a plasma cutter for the first real time to cut out the rotten section (outer frame rail first)..
Then I cut out the inner frame rail section (doesn't look as bad, but it was paper thing and pitted awful)
Just kinda went around and tacked in the inner frame rail section, when I flip the frame over I'll be able to weld around it better plus I didn't want the outer frame rail patch to hit on the welds
And then the outer section... I heated up the bottom section and hammered it down to give it a more factory curve to it