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I got some 2x6 Metal that’s 1/4 thick and hooligan offroad bracing to make rock rails cutting out the factory rocker. My question is, is 1/4 thick material to thick and heavy?
you will need a piece of 1/8" between the 2x6 and sheet metal to get a good weld, you'll be blowing holes into the sheet metal and not burning into the 1/4" without it.
Sheet metal to 1/4" with no middle man = bad times
X2 I used 3/16" tube on mine and still struggled with heat sink to the thicker tubing. On the passenger side I left the rocker a little long and rolled it up and it welded much better.
I used 2x4" and 1 1/2" angle between the inner rocker and the tube. I taper cut the angle from 1 1/2" at the back to 3/4" at the front to match the body taper. I used 2x2" tube on top of the 2x4" tube for more support and plug welded through the top of the kick panel.