Front shackle bushings

Dumb question! 2000 Freightliner classic xl it has greaseable shackles and bushings for the front leaf springs. I have never had these before. Should there be a noticable gap between the springs and the shackles? I assume not but I have always had traditional non greased leaf bushings. They don't make any bad bangs or pops. Also were these factory standard for this year or did someone add them later? Thanks!