In Roger's case, I'm not sure embrittelment argument holds up. It's not close to the fracture line like mine. In these triangulated 4 links, the uppers bars take extreme force keeping the rear end centered. With the front crossmember like mine has, both frame rails get loaded. Without, only one really gets loaded which isn't ideal.
Greg is right, they were both designed to be bolted in the chassis. As usual, we all think we know better than the engineer that designed the system. I'm not ready to say that bolting it in would have netted me better results at this point. 1/16" sheetmetal would take a beating either way.
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Todd
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