This is a welcome new part for the 3rd & 4th series Firebird & Camaro owners/ repairers.
On the outer frame as shown below lives the diff bump stops.. This will replace both for the price of less then one GM unit.
Master Kit: 2001-06 GMC / Silverad Various
Rear Sway Bar Bushing Set 1984-96: 19 mm
A Disc Kit: 74-78 Mustang II Stock Height High Perf Kit
Body Mount kit:80-98 F-150 F-250 F-350
86-88 4 Runner Complete Body (cab) Mount Set
65-70 Front Control Arm Bush Kit - Full Size Sedans
65-70 Impala / Parisienne Major Master kit
Leaf Spring Pads: Chrysler Type 2, W/o ribbed sides
73-79 B Leaf Spring Bushes
Hummer Cab Set 1994-04