Yucca-Man: Rubicon Express RE9900 Drop Brackets this gives approximate LCA lengths, when shops do them they use a rivet, they drill a hole them reem it so when the rivet is driven it lays flat so the leaf above slides over it. you can do this with a countersunk bolt or screw.BDS sells the clamps ready to go for 24.00. a unibit to reem it until it sits flat may be needed.