Is there some type of gasket, or filler material that goes between the 2 part spring clamp that goes around the axle tube on a 46 Chevy 1/2 ton pickup, that attaches the springs to the rear end? There seems to be a gap between the axle tube and housing on my '46. Any help wil be appreciated, also looking for a set of 46 shrtbed running boards, thanks, Brad