What is the purpose of the relocation brackets for the LCA?

 

Moves the axle end of th LCA lower than the body end of the LCA. On launch, that helps the LCA lift the body, and force the axle down toward the pavement. The stock LCA's are already angled like that, but if the car is lowered, or if it "squats" on launch, the relo brackets keep the LCA lower on the axle end.

 

do those have to be welded in? I would imagine so right?

 

there are bolt-on and weld-on types.

check ls1speed.com