Thanks for the comments guys. Keep them coming.
So here is where I ended up yesterday afternoon. Doesn't look like much but all cab and running board mounts were removed and nuts welded inside the frame to bolt them back on as I won't be able to get inside the frame and install the nuts after it's boxed. Time consuming but fun.
Ton's and ton's and ton's of holes filled. Frame is only out of square by 1/16" so it should be good to go.
And the front cross member and lower frame rails cleaned up in preparation for the new C4 cross member to be installed.
Man I really suck at taking pictures. What I see and what comes out of the camera is totally different.
Cheers!