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Re: Getting to the pinch weld?
For the front cross member most people cut it to the desired height, and make a removable plate to mount the air bag too. How much depends on bag style, and the A arm mods below.
The lower air arm they can do 1 of 2 things.
Cup the lower a arm with a section of pipe that clears the bag by a 1/2 all around.
Or plate the a arm after cutting out the spring pocket.
Like I said above if you Z the rear frame too this make mount a 4 link much easier, and give plenty of room.
Bags are mounted at static no pressure height to start. What I like to do is build my mount 1 inch higher so I can use aluminum plates to trim my ride comfort. Along with shock valving or adjustments. Your first plates can be wood for testing to determine desired height.
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