Offset leaf spring install ?

I've decided to install an offset shackle kit in my car.My question is should I remove the center section too.I plan on removing the axles cause I figure the heat will screw up the axle seals and trying to remove the seals prior to welding the pads will screw them up as well.Should I worry about the center section?I figure it far enough away from the heat.My bro inlaw say I should remove and drain the housing.Any chance of the gear lube lighting up?