Here is an alternate approach, similar to the stacking idea.

Rather than cut the frame and weld, first weld new rails in below the section you want lowered by Z'ing. Then cut out the old rails.

That way it should be as straight afterward as it is when you started. Or as bent as when you started...

Where in Seattle are you? I'd like to try to see this project some time.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...