Stop in for a cup of coffee

I'm working on these holes put by previous owner (s) in the frame rails, can easily get to bottom surface and can weld most of it. What I need to figure out is if I can't fill where the metal is gone on one side of the other of the rail, how do I get a welder in there? Fortunately, I plan on replacing the trunk floor, so can cut the spare tire carrier out for one side, other side, with the shackle not so easy. Would be if I had a two post lift, now trying to figure out how to set the Duster on blocks, on the lift and drop the rear axle out....

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