I believe the little rubberized pieces are just body sealer....not sure about the clips. Are they small "speed nuts" by any chance? A picture might help if you have one.

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"